Sierra Wireless EM7455: How to enable COM ports

Published February 1, 2017 | By zukota

Various EM7455 devices coming from different brands and sale channels are often configured differently. They come with different firmware versions installed, different settings, and some ports can be switched on or off. Sometimes COM ports are off when you get the device, but it is useful to have a COM port enabled in order to do extended diagnostics and alter some settings that are normally not possible.

So what do you need to enable the COM ports for your EM7455?

The instructions below are for Windows users. If you can easily find your way in Linux, just skip it and note that you only basically need to run ./swi_setusbcomp.pl –usbcomp=8 to enable COM ports. Follow this link for more info: https://www.mork.no/~bjorn/MC7455-fix-orig.txt

Method 1. Recommended and safe.

Download and unpack the following image file: UbuntuLive.7z

Then, download and install UltraISO software. Trial mode is enough for our purposes. UltraISO download link.

Insert a spare empty USB Flash Drive into your laptop. Make sure it’s 8GB or more. Smaller drive won’t work because this image was prepared on a 8GB USB Flash drive.

Launch UltraISO and open the image file “UbuntuLive.ima” you downloaded previously. Use File -> Open menu to do that. Then, navigate to Bootable -> Write Disk Image. You will see the following window:

Make sure that the correct USB Flash drive is selected in Disk Drive field. Make sure it’s not your disk C: or any of your hard drives. Don’t change any other options. Then click “Write” to write the image to the USB Flash drive. After it’s done, close UltraISO.

Now you need to reboot your laptop and enter the BIOS. Make sure that the boot settings in your BIOS is set to “Legacy mode” and not to “UEFI mode”. Also make sure that booting from USB Flash drive is enabled in your BIOS. Then save your BIOS settings and exit from the BIOS. If all is correct, you will see Ubuntu Live boot menu. Select “Try Ubuntu without installing” in the menu and press ENTER. Ubuntu will boot and you should see the Ubuntu desktop:

Now, right-click on the desktop and select “Open Terminal”. Enter the following commands:

sudo -i

and then

./swi_usbcomp.pl

The sample output is shown below:

ubuntu@ubuntu:~$ sudo -i
root@ubuntu:~# ./swi_usbcomp.pl 
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg '0x0021' returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
  0x00 (1.5)    'QMI_CTL'    - Control service
  0x01 (1.67)    'QMI_WDS'    - Wireless data service
  0x02 (1.14)    'QMI_DMS'    - Device management service
  0x03 (1.25)    'QMI_NAS'    - Network access service
  0x04 (1.6)    'QMI_QOS'    - Quality of service, err, service 
  0x05 (1.10)    'QMI_WMS'    - Wireless messaging service
  0x07 (1.3)    'QMI_AUTH'    - Authentication service
  0x08 (1.2)    'QMI_AT'    - AT command processor service
  0x09 (2.1)    'QMI_VOICE'    - Voice service
  0x0a (2.24)    'QMI_CAT2'    - Card application toolkit service (new)
  0x0b (1.45)    'QMI_UIM'    - UIM service
  0x0c (1.4)    'QMI_PBM'    - Phonebook service
  0x0f (1.0)    'QMI_TEST'    - Test service
  0x10 (2.0)    'QMI_LOC'    - Location service 
  0x11 (1.0)    'QMI_SAR'    - Specific absorption rate service
  0x17 (1.0)    'QMI_TS'    - Thermal sensors service
  0x18 (1.0)    'QMI_TMD'    - Thermal mitigation device service
  0x1a (1.16)    'QMI_WDA'    - Wireless data administrative service
  0x1d (1.1)    'QMI_CSVT'    - Circuit switched videotelephony service
  0x22 (1.0)    'QMI_COEX'    - Coexistence service
  0x24 (1.0)    'QMI_PDC'    - Persistent device configuration service
  0x29 (1.0)    'QMI_RFRPE'    - RF radiated performance enhancement service
  0x2a (1.0)    'QMI_DSD'    - Data system determination service
  0x2b (1.0)    'QMI_SSCTL'    - Subsystem control service
  0x2e (1.0)    'unknown'    - 
  0x30 (1.0)    'unknown'    - 
  0x31 (1.0)    'unknown'    - 
  0x36 (1.0)    'unknown'    - 
  0xe1 (1.0)    'QMI_RMS'    - Remote management service
  0xf0 (1.0)    'unknown'    - 
  0xf3 (1.0)    'unknown'    - 
  0xf5 (1.0)    'unknown'    - 
  0xf6 (1.0)    'unknown'    - 
QMI msg '0x0022' returned status = 1
Got QMI DMS client ID '3'
QMI msg '0x555b' returned status = 1
Current USB composition: 9
USB compositions:
   0 - HIP  DM    NMEA  AT    MDM1  MDM2  MDM3  MS      NOT SUPPORTED
   1 - HIP  DM    NMEA  AT    MDM1  MS                  NOT SUPPORTED
   2 - HIP  DM    NMEA  AT    NIC1  MS                  NOT SUPPORTED
   3 - HIP  DM    NMEA  AT    MDM1  NIC1  MS            NOT SUPPORTED
   4 - HIP  DM    NMEA  AT    NIC1  NIC2  NIC3  MS      NOT SUPPORTED
   5 - HIP  DM    NMEA  AT    ECM1  MS                  NOT SUPPORTED
   6 - DM   NMEA  AT    QMI                             SUPPORTED
   7 - DM   NMEA  AT    RMNET1 RMNET2 RMNET3            NOT SUPPORTED
   8 - DM   NMEA  AT    MBIM                            SUPPORTED
*  9 - MBIM                                             SUPPORTED
  10 - NMEA MBIM                                        NOT SUPPORTED
  11 - DM   MBIM                                        NOT SUPPORTED
  12 - DM   NMEA  MBIM                                  NOT SUPPORTED
  13 - Config1: comp6    Config2: comp8                 NOT SUPPORTED
  14 - Config1: comp6    Config2: comp9                 NOT SUPPORTED
  15 - Config1: comp6    Config2: comp10                NOT SUPPORTED
  16 - Config1: comp6    Config2: comp11                NOT SUPPORTED
  17 - Config1: comp6    Config2: comp12                NOT SUPPORTED
  18 - Config1: comp7    Config2: comp8                 NOT SUPPORTED
  19 - Config1: comp7    Config2: comp9                 NOT SUPPORTED
  20 - Config1: comp7    Config2: comp10                NOT SUPPORTED
  21 - Config1: comp7    Config2: comp11                NOT SUPPORTED
  22 - Config1: comp7    Config2: comp12                NOT SUPPORTED
QMI msg '0x0023' returned status = 1
root@ubuntu:~#

ubuntu@ubuntu:~$ sudo -i

root@ubuntu:~# ./swi_usbcomp.pl

Running in MBIM mode (driver=cdc_mbim)

MBIM OPEN succeeded

QMI msg '0x0021' returned status = 1

MBIM QMI support verified

supports 33 QMI subsystems:

0x00 (1.5) 'QMI_CTL' - Control service

0x01 (1.67) 'QMI_WDS' - Wireless data service

0x02 (1.14) 'QMI_DMS' - Device management service

0x03 (1.25) 'QMI_NAS' - Network access service

0x04 (1.6) 'QMI_QOS' - Quality of service, err, service

0x05 (1.10) 'QMI_WMS' - Wireless messaging service

0x07 (1.3) 'QMI_AUTH' - Authentication service

0x08 (1.2) 'QMI_AT' - AT command processor service

0x09 (2.1) 'QMI_VOICE' - Voice service

0x0a (2.24) 'QMI_CAT2' - Card application toolkit service (new)

0x0b (1.45) 'QMI_UIM' - UIM service

0x0c (1.4) 'QMI_PBM' - Phonebook service

0x0f (1.0) 'QMI_TEST' - Test service

0x10 (2.0) 'QMI_LOC' - Location service

0x11 (1.0) 'QMI_SAR' - Specific absorption rate service

0x17 (1.0) 'QMI_TS' - Thermal sensors service

0x18 (1.0) 'QMI_TMD' - Thermal mitigation device service

0x1a (1.16) 'QMI_WDA' - Wireless data administrative service

0x1d (1.1) 'QMI_CSVT' - Circuit switched videotelephony service

0x22 (1.0) 'QMI_COEX' - Coexistence service

0x24 (1.0) 'QMI_PDC' - Persistent device configuration service

0x29 (1.0) 'QMI_RFRPE' - RF radiated performance enhancement service

0x2a (1.0) 'QMI_DSD' - Data system determination service

0x2b (1.0) 'QMI_SSCTL' - Subsystem control service

0x2e (1.0) 'unknown' -

0x30 (1.0) 'unknown' -

0x31 (1.0) 'unknown' -

0x36 (1.0) 'unknown' -

0xe1 (1.0) 'QMI_RMS' - Remote management service

0xf0 (1.0) 'unknown' -

0xf3 (1.0) 'unknown' -

0xf5 (1.0) 'unknown' -

0xf6 (1.0) 'unknown' -

QMI msg '0x0022' returned status = 1

Got QMI DMS client ID '3'

QMI msg '0x555b' returned status = 1

Current USB composition: 9

USB compositions:

0 - HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED

1 - HIP DM NMEA AT MDM1 MS NOT SUPPORTED

2 - HIP DM NMEA AT NIC1 MS NOT SUPPORTED

3 - HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED

4 - HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED

5 - HIP DM NMEA AT ECM1 MS NOT SUPPORTED

6 - DM NMEA AT QMI SUPPORTED

7 - DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED

8 - DM NMEA AT MBIM SUPPORTED

* 9 - MBIM SUPPORTED

10 - NMEA MBIM NOT SUPPORTED

11 - DM MBIM NOT SUPPORTED

12 - DM NMEA MBIM NOT SUPPORTED

13 - Config1: comp6 Config2: comp8 NOT SUPPORTED

14 - Config1: comp6 Config2: comp9 NOT SUPPORTED

15 - Config1: comp6 Config2: comp10 NOT SUPPORTED

16 - Config1: comp6 Config2: comp11 NOT SUPPORTED

17 - Config1: comp6 Config2: comp12 NOT SUPPORTED

18 - Config1: comp7 Config2: comp8 NOT SUPPORTED

19 - Config1: comp7 Config2: comp9 NOT SUPPORTED

20 - Config1: comp7 Config2: comp10 NOT SUPPORTED

21 - Config1: comp7 Config2: comp11 NOT SUPPORTED

22 - Config1: comp7 Config2: comp12 NOT SUPPORTED

QMI msg '0x0023' returned status = 1

root@ubuntu:~#

We can see that the current USB composition for the EM7455 is set to 9, which is MBIM only. We need to have MBIM and also COM ports for the AT commands and NMEA GPS data. So we need the USB composition 8.

Just enter the following command to set the USB composition to 8:

./swi_usbcomp.pl –usbcomp=8

The output is shown below:

root@ubuntu:~# ./swi_usbcomp.pl --usbcomp=8
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg '0x0021' returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
  0x00 (1.5)    'QMI_CTL'    - Control service
  0x01 (1.67)    'QMI_WDS'    - Wireless data service
  0x02 (1.14)    'QMI_DMS'    - Device management service
  0x03 (1.25)    'QMI_NAS'    - Network access service
  0x04 (1.6)    'QMI_QOS'    - Quality of service, err, service 
  0x05 (1.10)    'QMI_WMS'    - Wireless messaging service
  0x07 (1.3)    'QMI_AUTH'    - Authentication service
  0x08 (1.2)    'QMI_AT'    - AT command processor service
  0x09 (2.1)    'QMI_VOICE'    - Voice service
  0x0a (2.24)    'QMI_CAT2'    - Card application toolkit service (new)
  0x0b (1.45)    'QMI_UIM'    - UIM service
  0x0c (1.4)    'QMI_PBM'    - Phonebook service
  0x0f (1.0)    'QMI_TEST'    - Test service
  0x10 (2.0)    'QMI_LOC'    - Location service 
  0x11 (1.0)    'QMI_SAR'    - Specific absorption rate service
  0x17 (1.0)    'QMI_TS'    - Thermal sensors service
  0x18 (1.0)    'QMI_TMD'    - Thermal mitigation device service
  0x1a (1.16)    'QMI_WDA'    - Wireless data administrative service
  0x1d (1.1)    'QMI_CSVT'    - Circuit switched videotelephony service
  0x22 (1.0)    'QMI_COEX'    - Coexistence service
  0x24 (1.0)    'QMI_PDC'    - Persistent device configuration service
  0x29 (1.0)    'QMI_RFRPE'    - RF radiated performance enhancement service
  0x2a (1.0)    'QMI_DSD'    - Data system determination service
  0x2b (1.0)    'QMI_SSCTL'    - Subsystem control service
  0x2e (1.0)    'unknown'    - 
  0x30 (1.0)    'unknown'    - 
  0x31 (1.0)    'unknown'    - 
  0x36 (1.0)    'unknown'    - 
  0xe1 (1.0)    'QMI_RMS'    - Remote management service
  0xf0 (1.0)    'unknown'    - 
  0xf3 (1.0)    'unknown'    - 
  0xf5 (1.0)    'unknown'    - 
  0xf6 (1.0)    'unknown'    - 
QMI msg '0x0022' returned status = 1
Got QMI DMS client ID '3'
QMI msg '0x555b' returned status = 1
Current USB composition: 9
USB compositions:
   0 - HIP  DM    NMEA  AT    MDM1  MDM2  MDM3  MS      NOT SUPPORTED
   1 - HIP  DM    NMEA  AT    MDM1  MS                  NOT SUPPORTED
   2 - HIP  DM    NMEA  AT    NIC1  MS                  NOT SUPPORTED
   3 - HIP  DM    NMEA  AT    MDM1  NIC1  MS            NOT SUPPORTED
   4 - HIP  DM    NMEA  AT    NIC1  NIC2  NIC3  MS      NOT SUPPORTED
   5 - HIP  DM    NMEA  AT    ECM1  MS                  NOT SUPPORTED
   6 - DM   NMEA  AT    QMI                             SUPPORTED
   7 - DM   NMEA  AT    RMNET1 RMNET2 RMNET3            NOT SUPPORTED
   8 - DM   NMEA  AT    MBIM                            SUPPORTED
*  9 - MBIM                                             SUPPORTED
  10 - NMEA MBIM                                        NOT SUPPORTED
  11 - DM   MBIM                                        NOT SUPPORTED
  12 - DM   NMEA  MBIM                                  NOT SUPPORTED
  13 - Config1: comp6    Config2: comp8                 NOT SUPPORTED
  14 - Config1: comp6    Config2: comp9                 NOT SUPPORTED
  15 - Config1: comp6    Config2: comp10                NOT SUPPORTED
  16 - Config1: comp6    Config2: comp11                NOT SUPPORTED
  17 - Config1: comp6    Config2: comp12                NOT SUPPORTED
  18 - Config1: comp7    Config2: comp8                 NOT SUPPORTED
  19 - Config1: comp7    Config2: comp9                 NOT SUPPORTED
  20 - Config1: comp7    Config2: comp10                NOT SUPPORTED
  21 - Config1: comp7    Config2: comp11                NOT SUPPORTED
  22 - Config1: comp7    Config2: comp12                NOT SUPPORTED
QMI msg '0x555c' returned status = 1
QMI msg '0x0023' returned status = 1
root@ubuntu:~#

root@ubuntu:~# ./swi_usbcomp.pl --usbcomp=8

Running in MBIM mode (driver=cdc_mbim)

MBIM OPEN succeeded

QMI msg '0x0021' returned status = 1

MBIM QMI support verified

supports 33 QMI subsystems:

0x00 (1.5) 'QMI_CTL' - Control service

0x01 (1.67) 'QMI_WDS' - Wireless data service

0x02 (1.14) 'QMI_DMS' - Device management service

0x03 (1.25) 'QMI_NAS' - Network access service

0x04 (1.6) 'QMI_QOS' - Quality of service, err, service

0x05 (1.10) 'QMI_WMS' - Wireless messaging service

0x07 (1.3) 'QMI_AUTH' - Authentication service

0x08 (1.2) 'QMI_AT' - AT command processor service

0x09 (2.1) 'QMI_VOICE' - Voice service

0x0a (2.24) 'QMI_CAT2' - Card application toolkit service (new)

0x0b (1.45) 'QMI_UIM' - UIM service

0x0c (1.4) 'QMI_PBM' - Phonebook service

0x0f (1.0) 'QMI_TEST' - Test service

0x10 (2.0) 'QMI_LOC' - Location service

0x11 (1.0) 'QMI_SAR' - Specific absorption rate service

0x17 (1.0) 'QMI_TS' - Thermal sensors service

0x18 (1.0) 'QMI_TMD' - Thermal mitigation device service

0x1a (1.16) 'QMI_WDA' - Wireless data administrative service

0x1d (1.1) 'QMI_CSVT' - Circuit switched videotelephony service

0x22 (1.0) 'QMI_COEX' - Coexistence service

0x24 (1.0) 'QMI_PDC' - Persistent device configuration service

0x29 (1.0) 'QMI_RFRPE' - RF radiated performance enhancement service

0x2a (1.0) 'QMI_DSD' - Data system determination service

0x2b (1.0) 'QMI_SSCTL' - Subsystem control service

0x2e (1.0) 'unknown' -

0x30 (1.0) 'unknown' -

0x31 (1.0) 'unknown' -

0x36 (1.0) 'unknown' -

0xe1 (1.0) 'QMI_RMS' - Remote management service

0xf0 (1.0) 'unknown' -

0xf3 (1.0) 'unknown' -

0xf5 (1.0) 'unknown' -

0xf6 (1.0) 'unknown' -

QMI msg '0x0022' returned status = 1

Got QMI DMS client ID '3'

QMI msg '0x555b' returned status = 1

Current USB composition: 9

USB compositions:

0 - HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED

1 - HIP DM NMEA AT MDM1 MS NOT SUPPORTED

2 - HIP DM NMEA AT NIC1 MS NOT SUPPORTED

3 - HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED

4 - HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED

5 - HIP DM NMEA AT ECM1 MS NOT SUPPORTED

6 - DM NMEA AT QMI SUPPORTED

7 - DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED

8 - DM NMEA AT MBIM SUPPORTED

* 9 - MBIM SUPPORTED

10 - NMEA MBIM NOT SUPPORTED

11 - DM MBIM NOT SUPPORTED

12 - DM NMEA MBIM NOT SUPPORTED

13 - Config1: comp6 Config2: comp8 NOT SUPPORTED

14 - Config1: comp6 Config2: comp9 NOT SUPPORTED

15 - Config1: comp6 Config2: comp10 NOT SUPPORTED

16 - Config1: comp6 Config2: comp11 NOT SUPPORTED

17 - Config1: comp6 Config2: comp12 NOT SUPPORTED

18 - Config1: comp7 Config2: comp8 NOT SUPPORTED

19 - Config1: comp7 Config2: comp9 NOT SUPPORTED

20 - Config1: comp7 Config2: comp10 NOT SUPPORTED

21 - Config1: comp7 Config2: comp11 NOT SUPPORTED

22 - Config1: comp7 Config2: comp12 NOT SUPPORTED

QMI msg '0x555c' returned status = 1

QMI msg '0x0023' returned status = 1

root@ubuntu:~#

Check again if the USB composition switch was successful:

root@ubuntu:~# ./swi_usbcomp.pl 
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg '0x0021' returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
  0x00 (1.5)    'QMI_CTL'    - Control service
  0x01 (1.67)    'QMI_WDS'    - Wireless data service
  0x02 (1.14)    'QMI_DMS'    - Device management service
  0x03 (1.25)    'QMI_NAS'    - Network access service
  0x04 (1.6)    'QMI_QOS'    - Quality of service, err, service 
  0x05 (1.10)    'QMI_WMS'    - Wireless messaging service
  0x07 (1.3)    'QMI_AUTH'    - Authentication service
  0x08 (1.2)    'QMI_AT'    - AT command processor service
  0x09 (2.1)    'QMI_VOICE'    - Voice service
  0x0a (2.24)    'QMI_CAT2'    - Card application toolkit service (new)
  0x0b (1.45)    'QMI_UIM'    - UIM service
  0x0c (1.4)    'QMI_PBM'    - Phonebook service
  0x0f (1.0)    'QMI_TEST'    - Test service
  0x10 (2.0)    'QMI_LOC'    - Location service 
  0x11 (1.0)    'QMI_SAR'    - Specific absorption rate service
  0x17 (1.0)    'QMI_TS'    - Thermal sensors service
  0x18 (1.0)    'QMI_TMD'    - Thermal mitigation device service
  0x1a (1.16)    'QMI_WDA'    - Wireless data administrative service
  0x1d (1.1)    'QMI_CSVT'    - Circuit switched videotelephony service
  0x22 (1.0)    'QMI_COEX'    - Coexistence service
  0x24 (1.0)    'QMI_PDC'    - Persistent device configuration service
  0x29 (1.0)    'QMI_RFRPE'    - RF radiated performance enhancement service
  0x2a (1.0)    'QMI_DSD'    - Data system determination service
  0x2b (1.0)    'QMI_SSCTL'    - Subsystem control service
  0x2e (1.0)    'unknown'    - 
  0x30 (1.0)    'unknown'    - 
  0x31 (1.0)    'unknown'    - 
  0x36 (1.0)    'unknown'    - 
  0xe1 (1.0)    'QMI_RMS'    - Remote management service
  0xf0 (1.0)    'unknown'    - 
  0xf3 (1.0)    'unknown'    - 
  0xf5 (1.0)    'unknown'    - 
  0xf6 (1.0)    'unknown'    - 
QMI msg '0x0022' returned status = 1
Got QMI DMS client ID '3'
QMI msg '0x555b' returned status = 1
Current USB composition: 8
USB compositions:
   0 - HIP  DM    NMEA  AT    MDM1  MDM2  MDM3  MS      NOT SUPPORTED
   1 - HIP  DM    NMEA  AT    MDM1  MS                  NOT SUPPORTED
   2 - HIP  DM    NMEA  AT    NIC1  MS                  NOT SUPPORTED
   3 - HIP  DM    NMEA  AT    MDM1  NIC1  MS            NOT SUPPORTED
   4 - HIP  DM    NMEA  AT    NIC1  NIC2  NIC3  MS      NOT SUPPORTED
   5 - HIP  DM    NMEA  AT    ECM1  MS                  NOT SUPPORTED
   6 - DM   NMEA  AT    QMI                             SUPPORTED
   7 - DM   NMEA  AT    RMNET1 RMNET2 RMNET3            NOT SUPPORTED
*  8 - DM   NMEA  AT    MBIM                            SUPPORTED
   9 - MBIM                                             SUPPORTED
  10 - NMEA MBIM                                        NOT SUPPORTED
  11 - DM   MBIM                                        NOT SUPPORTED
  12 - DM   NMEA  MBIM                                  NOT SUPPORTED
  13 - Config1: comp6    Config2: comp8                 NOT SUPPORTED
  14 - Config1: comp6    Config2: comp9                 NOT SUPPORTED
  15 - Config1: comp6    Config2: comp10                NOT SUPPORTED
  16 - Config1: comp6    Config2: comp11                NOT SUPPORTED
  17 - Config1: comp6    Config2: comp12                NOT SUPPORTED
  18 - Config1: comp7    Config2: comp8                 NOT SUPPORTED
  19 - Config1: comp7    Config2: comp9                 NOT SUPPORTED
  20 - Config1: comp7    Config2: comp10                NOT SUPPORTED
  21 - Config1: comp7    Config2: comp11                NOT SUPPORTED
  22 - Config1: comp7    Config2: comp12                NOT SUPPORTED
QMI msg '0x0023' returned status = 1

root@ubuntu:~# ./swi_usbcomp.pl

Running in MBIM mode (driver=cdc_mbim)

MBIM OPEN succeeded

QMI msg '0x0021' returned status = 1

MBIM QMI support verified

supports 33 QMI subsystems:

0x00 (1.5) 'QMI_CTL' - Control service

0x01 (1.67) 'QMI_WDS' - Wireless data service

0x02 (1.14) 'QMI_DMS' - Device management service

0x03 (1.25) 'QMI_NAS' - Network access service

0x04 (1.6) 'QMI_QOS' - Quality of service, err, service

0x05 (1.10) 'QMI_WMS' - Wireless messaging service

0x07 (1.3) 'QMI_AUTH' - Authentication service

0x08 (1.2) 'QMI_AT' - AT command processor service

0x09 (2.1) 'QMI_VOICE' - Voice service

0x0a (2.24) 'QMI_CAT2' - Card application toolkit service (new)

0x0b (1.45) 'QMI_UIM' - UIM service

0x0c (1.4) 'QMI_PBM' - Phonebook service

0x0f (1.0) 'QMI_TEST' - Test service

0x10 (2.0) 'QMI_LOC' - Location service

0x11 (1.0) 'QMI_SAR' - Specific absorption rate service

0x17 (1.0) 'QMI_TS' - Thermal sensors service

0x18 (1.0) 'QMI_TMD' - Thermal mitigation device service

0x1a (1.16) 'QMI_WDA' - Wireless data administrative service

0x1d (1.1) 'QMI_CSVT' - Circuit switched videotelephony service

0x22 (1.0) 'QMI_COEX' - Coexistence service

0x24 (1.0) 'QMI_PDC' - Persistent device configuration service

0x29 (1.0) 'QMI_RFRPE' - RF radiated performance enhancement service

0x2a (1.0) 'QMI_DSD' - Data system determination service

0x2b (1.0) 'QMI_SSCTL' - Subsystem control service

0x2e (1.0) 'unknown' -

0x30 (1.0) 'unknown' -

0x31 (1.0) 'unknown' -

0x36 (1.0) 'unknown' -

0xe1 (1.0) 'QMI_RMS' - Remote management service

0xf0 (1.0) 'unknown' -

0xf3 (1.0) 'unknown' -

0xf5 (1.0) 'unknown' -

0xf6 (1.0) 'unknown' -

QMI msg '0x0022' returned status = 1

Got QMI DMS client ID '3'

QMI msg '0x555b' returned status = 1

Current USB composition: 8

USB compositions:

0 - HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED

1 - HIP DM NMEA AT MDM1 MS NOT SUPPORTED

2 - HIP DM NMEA AT NIC1 MS NOT SUPPORTED

3 - HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED

4 - HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED

5 - HIP DM NMEA AT ECM1 MS NOT SUPPORTED

6 - DM NMEA AT QMI SUPPORTED

7 - DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED

* 8 - DM NMEA AT MBIM SUPPORTED

9 - MBIM SUPPORTED

10 - NMEA MBIM NOT SUPPORTED

11 - DM MBIM NOT SUPPORTED

12 - DM NMEA MBIM NOT SUPPORTED

13 - Config1: comp6 Config2: comp8 NOT SUPPORTED

14 - Config1: comp6 Config2: comp9 NOT SUPPORTED

15 - Config1: comp6 Config2: comp10 NOT SUPPORTED

16 - Config1: comp6 Config2: comp11 NOT SUPPORTED

17 - Config1: comp6 Config2: comp12 NOT SUPPORTED

18 - Config1: comp7 Config2: comp8 NOT SUPPORTED

19 - Config1: comp7 Config2: comp9 NOT SUPPORTED

20 - Config1: comp7 Config2: comp10 NOT SUPPORTED

21 - Config1: comp7 Config2: comp11 NOT SUPPORTED

22 - Config1: comp7 Config2: comp12 NOT SUPPORTED

QMI msg '0x0023' returned status = 1

Nice, it worked! All we need now is to reset the EM7455 in order for the new USB composition to take effect. Enter the following command:

./swi_usbcomp.pl –reset

root@ubuntu:~# ./swi_usbcomp.pl --reset
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg '0x0021' returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
  0x00 (1.5)    'QMI_CTL'    - Control service
  0x01 (1.67)    'QMI_WDS'    - Wireless data service
  0x02 (1.14)    'QMI_DMS'    - Device management service
  0x03 (1.25)    'QMI_NAS'    - Network access service
  0x04 (1.6)    'QMI_QOS'    - Quality of service, err, service 
  0x05 (1.10)    'QMI_WMS'    - Wireless messaging service
  0x07 (1.3)    'QMI_AUTH'    - Authentication service
  0x08 (1.2)    'QMI_AT'    - AT command processor service
  0x09 (2.1)    'QMI_VOICE'    - Voice service
  0x0a (2.24)    'QMI_CAT2'    - Card application toolkit service (new)
  0x0b (1.45)    'QMI_UIM'    - UIM service
  0x0c (1.4)    'QMI_PBM'    - Phonebook service
  0x0f (1.0)    'QMI_TEST'    - Test service
  0x10 (2.0)    'QMI_LOC'    - Location service 
  0x11 (1.0)    'QMI_SAR'    - Specific absorption rate service
  0x17 (1.0)    'QMI_TS'    - Thermal sensors service
  0x18 (1.0)    'QMI_TMD'    - Thermal mitigation device service
  0x1a (1.16)    'QMI_WDA'    - Wireless data administrative service
  0x1d (1.1)    'QMI_CSVT'    - Circuit switched videotelephony service
  0x22 (1.0)    'QMI_COEX'    - Coexistence service
  0x24 (1.0)    'QMI_PDC'    - Persistent device configuration service
  0x29 (1.0)    'QMI_RFRPE'    - RF radiated performance enhancement service
  0x2a (1.0)    'QMI_DSD'    - Data system determination service
  0x2b (1.0)    'QMI_SSCTL'    - Subsystem control service
  0x2e (1.0)    'unknown'    - 
  0x30 (1.0)    'unknown'    - 
  0x31 (1.0)    'unknown'    - 
  0x36 (1.0)    'unknown'    - 
  0xe1 (1.0)    'QMI_RMS'    - Remote management service
  0xf0 (1.0)    'unknown'    - 
  0xf3 (1.0)    'unknown'    - 
  0xf5 (1.0)    'unknown'    - 
  0xf6 (1.0)    'unknown'    - 
QMI msg '0x0022' returned status = 1
Got QMI DMS client ID '3'
QMI msg '0x555b' returned status = 1
Current USB composition: 8
USB compositions:
   0 - HIP  DM    NMEA  AT    MDM1  MDM2  MDM3  MS      NOT SUPPORTED
   1 - HIP  DM    NMEA  AT    MDM1  MS                  NOT SUPPORTED
   2 - HIP  DM    NMEA  AT    NIC1  MS                  NOT SUPPORTED
   3 - HIP  DM    NMEA  AT    MDM1  NIC1  MS            NOT SUPPORTED
   4 - HIP  DM    NMEA  AT    NIC1  NIC2  NIC3  MS      NOT SUPPORTED
   5 - HIP  DM    NMEA  AT    ECM1  MS                  NOT SUPPORTED
   6 - DM   NMEA  AT    QMI                             SUPPORTED
   7 - DM   NMEA  AT    RMNET1 RMNET2 RMNET3            NOT SUPPORTED
*  8 - DM   NMEA  AT    MBIM                            SUPPORTED
   9 - MBIM                                             SUPPORTED
  10 - NMEA MBIM                                        NOT SUPPORTED
  11 - DM   MBIM                                        NOT SUPPORTED
  12 - DM   NMEA  MBIM                                  NOT SUPPORTED
  13 - Config1: comp6    Config2: comp8                 NOT SUPPORTED
  14 - Config1: comp6    Config2: comp9                 NOT SUPPORTED
  15 - Config1: comp6    Config2: comp10                NOT SUPPORTED
  16 - Config1: comp6    Config2: comp11                NOT SUPPORTED
  17 - Config1: comp6    Config2: comp12                NOT SUPPORTED
  18 - Config1: comp7    Config2: comp8                 NOT SUPPORTED
  19 - Config1: comp7    Config2: comp9                 NOT SUPPORTED
  20 - Config1: comp7    Config2: comp10                NOT SUPPORTED
  21 - Config1: comp7    Config2: comp11                NOT SUPPORTED
  22 - Config1: comp7    Config2: comp12                NOT SUPPORTED
QMI msg '0x002e' returned status = 1
eof
    ...propagated at ./swi_usbcomp.pl line 251.
root@ubuntu:~#

root@ubuntu:~# ./swi_usbcomp.pl --reset

Running in MBIM mode (driver=cdc_mbim)

MBIM OPEN succeeded

QMI msg '0x0021' returned status = 1

MBIM QMI support verified

supports 33 QMI subsystems:

0x00 (1.5) 'QMI_CTL' - Control service

0x01 (1.67) 'QMI_WDS' - Wireless data service

0x02 (1.14) 'QMI_DMS' - Device management service

0x03 (1.25) 'QMI_NAS' - Network access service

0x04 (1.6) 'QMI_QOS' - Quality of service, err, service

0x05 (1.10) 'QMI_WMS' - Wireless messaging service

0x07 (1.3) 'QMI_AUTH' - Authentication service

0x08 (1.2) 'QMI_AT' - AT command processor service

0x09 (2.1) 'QMI_VOICE' - Voice service

0x0a (2.24) 'QMI_CAT2' - Card application toolkit service (new)

0x0b (1.45) 'QMI_UIM' - UIM service

0x0c (1.4) 'QMI_PBM' - Phonebook service

0x0f (1.0) 'QMI_TEST' - Test service

0x10 (2.0) 'QMI_LOC' - Location service

0x11 (1.0) 'QMI_SAR' - Specific absorption rate service

0x17 (1.0) 'QMI_TS' - Thermal sensors service

0x18 (1.0) 'QMI_TMD' - Thermal mitigation device service

0x1a (1.16) 'QMI_WDA' - Wireless data administrative service

0x1d (1.1) 'QMI_CSVT' - Circuit switched videotelephony service

0x22 (1.0) 'QMI_COEX' - Coexistence service

0x24 (1.0) 'QMI_PDC' - Persistent device configuration service

0x29 (1.0) 'QMI_RFRPE' - RF radiated performance enhancement service

0x2a (1.0) 'QMI_DSD' - Data system determination service

0x2b (1.0) 'QMI_SSCTL' - Subsystem control service

0x2e (1.0) 'unknown' -

0x30 (1.0) 'unknown' -

0x31 (1.0) 'unknown' -

0x36 (1.0) 'unknown' -

0xe1 (1.0) 'QMI_RMS' - Remote management service

0xf0 (1.0) 'unknown' -

0xf3 (1.0) 'unknown' -

0xf5 (1.0) 'unknown' -

0xf6 (1.0) 'unknown' -

QMI msg '0x0022' returned status = 1

Got QMI DMS client ID '3'

QMI msg '0x555b' returned status = 1

Current USB composition: 8

USB compositions:

0 - HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED

1 - HIP DM NMEA AT MDM1 MS NOT SUPPORTED

2 - HIP DM NMEA AT NIC1 MS NOT SUPPORTED

3 - HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED

4 - HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED

5 - HIP DM NMEA AT ECM1 MS NOT SUPPORTED

6 - DM NMEA AT QMI SUPPORTED

7 - DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED

* 8 - DM NMEA AT MBIM SUPPORTED

9 - MBIM SUPPORTED

10 - NMEA MBIM NOT SUPPORTED

11 - DM MBIM NOT SUPPORTED

12 - DM NMEA MBIM NOT SUPPORTED

13 - Config1: comp6 Config2: comp8 NOT SUPPORTED

14 - Config1: comp6 Config2: comp9 NOT SUPPORTED

15 - Config1: comp6 Config2: comp10 NOT SUPPORTED

16 - Config1: comp6 Config2: comp11 NOT SUPPORTED

17 - Config1: comp6 Config2: comp12 NOT SUPPORTED

18 - Config1: comp7 Config2: comp8 NOT SUPPORTED

19 - Config1: comp7 Config2: comp9 NOT SUPPORTED

20 - Config1: comp7 Config2: comp10 NOT SUPPORTED

21 - Config1: comp7 Config2: comp11 NOT SUPPORTED

22 - Config1: comp7 Config2: comp12 NOT SUPPORTED

QMI msg '0x002e' returned status = 1

eof

...propagated at ./swi_usbcomp.pl line 251.

root@ubuntu:~#

Now you can close the terminal and reboot the Ubuntu. Remove the USB Flash drive from your laptop and restore the boot settings in your BIOS if you altered it. Now boot back to Windows and you’ll see 3 COM ports appear in the Device Manager: AT port for commands, NMEA port for GPS data and Quallcomm diagnostic port. All of these ports can be very useful and I will describe working with them in one of my next posts.

That was the preferred method of enabling COM ports and you should try it first. There is also another way, which is not recommended, because it requires to install some Windows drivers that potentially can flash your EM7455 automatically without asking any permission. If you still need to do that, proceed with caution!

Method 2. Not really recommended.

First, note what brand your device is (look at the sticker) and check the device ID in the Windows Device Manager. There can be the following ID for the EM7455 module:

VID  : PID
413C : 81B6 - Dell DW5811e LTE version
413C : 81B8 - Dell DW5811e HSPA only version (do not get this)
1199 : 9071 - EM7455 Generic Sierra Wireless
1199 : 9079 - EM7455 Lenovo version

VID : PID

413C : 81B6 - Dell DW5811e LTE version

413C : 81B8 - Dell DW5811e HSPA only version (do not get this)

1199 : 9071 - EM7455 Generic Sierra Wireless

1199 : 9079 - EM7455 Lenovo version

Then you’ll need to download your device’s corresponding driver:

Download Lenovo drivers
Download Dell drivers
Sierra Wireless Generic drivers

After downloading, unpack the driver by using 7Zip so you get the following files:

Dell driver:

Sierra Wireless driver:

For the Lenovo driver, it’s a little more complicated as 7Zip won’t recognize the file format to unpack it. To unpack it, first run the downloaded file:

Follow all the steps, including the path where you want the driver to be extracted. After extracting the drivers you will see the following dialog, make sure to untick “Install Sierra Wireless EM7455 Software now”:

After that, you will find the extracted driver at the location you specified:

Now, you need to run the extracted driver EXE file with USBCOMP=8 command line. For example:

Complete the driver installation, then wait for 20 minutes. The driver will install all corresponding files and change the USB composition, and COM ports will appear in your Device Manager. The EM7455 will restart several times during that process, do not reboot Windows before it’s finished. Just wait for 20 minutes after the driver is installed. It’s possible that the drivers will flash your EM7455 automatically with some newer software version during installation. Just allow it to do its work and DO NOT INTERRUPT the process. After the COM ports are enabled, you can uninstall the drivers, because they include a lot of unneeded bloatware, like some Windows services to change the firmware, etc. Well, the latter is up to you, I personally prefer not to have any extra program or service running in my laptop besides vanilla device drivers.

If you prefer to have just vanilla drivers, just run the extracted driver EXE file with EXTRACTDRIVERS=1 command line:

It will extract the drivers to some folder next to the driver EXE file:

Inside that folder, namely “Lenovo Mobile Broadband Driver Package” you will find a driver package ready to be installed. Just open the “Unrecognized device” properties in Device Manager and click “Install Driver”, then point Windows to the this extracted folder. The driver will be installed.

28 Responses to Sierra Wireless EM7455: How to enable COM ports

Mahesh on February 3, 2017 at 1:32 pm

Hi,

Followed the stepsm however after using “./swi_usbcomp.pl ” command, not getting the desired output.

Thanks

Reply
- zukota on February 3, 2017 at 1:46 pm
  
  What is your device exactly? What is the device USB VID/PID? What exactly output you’re getting?
  
  Reply
  - Mahesh on February 3, 2017 at 2:58 pm
    
    Hi,
    
    I have Lenovo Sierra EM7455, with these H/W ID – 1199 : 9079
    
    While using the command this what I am getting :
    
    ubuntu@ubuntu:~$ sudo -i
    root@ubuntu:~# ./swi_usbcomp.pl
    Use of uninitialized value in subroutine entry at ./swi_usbcomp.pl line 481.
    ‘/dev/cdc-wdm0’ is not a character device
    root@ubuntu:~#
    
    Reply
    - zukota on February 3, 2017 at 4:51 pm
      
      Is your device visible in Windows Device Manager? Looks like Ubuntu cannot see your device at all. What is your current composition? Maybe you have MBIM disabled, in that case you cannot switch the USB composition as described in this post, because it requires a working MBIM interface.
      
      Reply
    - zukota on February 12, 2017 at 5:59 am
      
      Try to check if Linux can detect your device at all:
      sudo ls -la /dev/cdc*
      and
      sudo dmesg | grep cdc
      
      Reply
    - MIke on April 18, 2017 at 2:41 am
      
      Most likely your device is showing up as “cdc-wdm#” and not as the default “cdc-wdm0”
      
      You can find out what number your device is by typing on the following
      
      ls /dev
      
      Look for “cdc-wdm#”. Now you’ll need to type following (replace # with the number that shows up in your system)
      
      ./swi_usbcomp.pl –device=/dev/cdc-wdm#
      
      ./swi_usbcomp.pl –device=/dev/cdc-wdm2 –usbcomp=8
      
      Btw, zukota, you have a typo in your guide. You’re missing a hyphen for –usbcomp=8.
      
      Reply
      - jcadduono on July 19, 2017 at 10:29 am
        
        I’m actually having the same issue, the cdc_mbim driver is failing to initialize the device, ex.
        
        [ 462.502716] usb 1-2: new high-speed USB device number 4 using xhci_hcd
        [ 462.827026] usb 1-2: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64
        [ 462.827027] usb 1-2: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64
        [ 462.827641] usb 1-2: New USB device found, idVendor=1199, idProduct=9078
        [ 462.827642] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
        [ 462.827643] usb 1-2: Product: Sierra Wireless EM7455 Qualcomm
        [ 462.827644] usb 1-2: Manufacturer: Sierra Wireless, Incorporated
        [ 462.827644] usb 1-2: SerialNumber: LF**************
        [ 463.463520] usb 1-2: USB disconnect, device number 4
        [ 474.169208] usb 1-2: new high-speed USB device number 5 using xhci_hcd
        [ 474.493926] usb 1-2: config 1 has an invalid interface number: 12 but max is 1
        [ 474.493927] usb 1-2: config 1 has an invalid interface number: 13 but max is 1
        [ 474.493927] usb 1-2: config 1 has an invalid interface number: 13 but max is 1
        [ 474.493928] usb 1-2: config 1 has no interface number 0
        [ 474.493929] usb 1-2: config 1 has no interface number 1
        [ 474.494614] usb 1-2: New USB device found, idVendor=1199, idProduct=9079
        [ 474.494615] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
        [ 474.494616] usb 1-2: Product: Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A
        [ 474.494616] usb 1-2: Manufacturer: Sierra Wireless, Incorporated
        [ 474.494617] usb 1-2: SerialNumber: LF***************
        [ 474.495211] cdc_mbim 1-2:1.12: failed GET_NTB_PARAMETERS
        [ 474.495213] cdc_mbim 1-2:1.12: bind() failure
        
        This is happening with both a Dell dw5811e and the Lenovo EM7455 using a USB to WWAN M.2 adapter.
      - melezov on August 14, 2017 at 6:01 am
        
        Hey, Zukota & Mike!
        
        Thanx for the great tutorial – just a HEADS UP for others who got stuck with swi_usbcomp.pl “not doing anything”. It seems that this comment thread replaces normal hyphens (minuses) with a slightly more readible ndash HTML character.
        
        Mike already commented that the hyphen is missing, but it’s actually replaced.
        
        In other to fix this, just paste the -usbcomp=8 line and then replace the long minus with the proper one by typing it. Either that, or don’t copy paste but retype the command, it’s not that long 🙂
Mahesh on February 3, 2017 at 6:49 pm

In windows, device manager the device is showing. How to enable/activate the MBIM interface?

Reply
Vince on March 14, 2017 at 7:37 pm

Your solution is flawed for TP 8 users, as legacy boot is ‘disabled’.
https://forums.lenovo.com/t5/Linux-Discussion/Unable-to-select-Legacy-Boot-option-on-Lenovo-ThinkPad-8/td-p/1501584

Any reliable way to activate COM ports on a TP8 without inadvertently flashing the EM7345 rom.

Reply
ortho on March 23, 2017 at 5:24 am

Hi, thanks for this article! I see in your console output that the em7455 supports the QMI_VOICE MBIM service. Does this mean that this module finally supports ordinary incoming/outgoing cell phone calls in Win 10 pro? Maybe even with wake from standby on incoming calls? That would be great. Could you please share your experiences? In particular, is a special firmware or app required or is the Microsoft Phone app in Win 10 pro sufficient? Thanks!

Reply
- zukota on March 25, 2017 at 11:38 am
  
  As far as I know, Sierra Wireless promised to include voice call functionality in one of the future firmware updates. Up until now, it’s not yet implemented. There was a thread on Sierra Wireless forums about that as far as I remember.
  
  Reply
  - Semy on March 27, 2017 at 11:35 pm
    
    Hi…Dear Zukota…
    here was my comment at the Lenovo Forum side…
    
    Sierra Wireless EM7455 COM ports are Locked… Lenovo Why do you do something like that? [ Edited ]
    
    ‎03-27-2017 01:20 AM – edited ‎03-27-2017 01:32 AM
    
    Lenovo why you lock the com ports on the Sierra Wireless EM7455 ?????
    
    USB composition for the EM7455 is set to 9, which is MBIM only. I need to have MBIM and also COM ports for the AT commands and NMEA GPS data. So I need the USB composition 8
    
    My question how to enable the com ports again ???
    
    thank you in Advance…
    and here was the official answer…
    
    x220forme
    Posts: 7,522
    Registered: ‎06-06-2011
    Location: RU
    Message 2 of 2 (41 Views)
    Re: Sierra Wireless EM7455 COM ports are Locked… Lenovo Why do you do something like that? [ Edited ]
    
    ‎03-27-2017 01:52 AM – edited ‎03-27-2017 01:53 AM
    
    Hello and welcome
    
    That’s not a Lenovo deal to lock the ports, more clearly, to choose appropriate default USB composition. MS and Sierra do that.
    
    To change default USB composition change Sierra wwan card drivers installation configuration and reinstall them. Edit the configuration.ini file within the drivers package:
    – [Default Values] section
    – USBCOMP=x parameter (choose 8 as you want).
    
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    Reply
    - Semy on March 27, 2017 at 11:37 pm
      
      and here is the link…
      
      https://forums.lenovo.com/t5/ThinkPad-X-Series-Laptops/Sierra-Wireless-EM7455-COM-ports-are-Locked-Lenovo-Why-do-you-do/m-p/3620040#M75683
      
      Reply
  - ortho on March 29, 2017 at 7:18 am
    
    Thanks. I know the Sierra thread you mean. The above console output “supports 33 QMI subsystems: … 9 (2.1) ‘QMI_VOICE’ – Voice service” just sounded so hopeful/implemented. But its more waiting, I guess.
    
    Reply
    - JB on May 17, 2017 at 4:18 am
      
      This sounds related to an issue I have seen when using MultiSIM cards (multiple SIM cards tied to one phone number) in a phone and in a WWAN card on the laptop. When roaming the SIM card in the phone is capable of making outgoing calls but not receiving incoming calls. As per the carrier they can see in the logs that when a call comes in it is routed to a SIM in a Thinkpad but the call rather than the phone and the call ends up on voice mail (as the Thinkpad cannot take the call). I found that Lenovo provided new firmware for laptops with Huawei modems to support multi-sim carriers but nothing in the change log for Sierra EM7455. I tried the latest firmware from the 7.34.4643.0102 package without success. Cross checked the SIM cards and the functionality of the phone is restored when both SIM cards are in a phone and registered with the network, so it seems the WWAN card/Firmware is somehow involved. Netsh mbn sh cap int=* shows Voice class: No Voice.
      Could that be related ?
      
      Reply
      - zukota on May 23, 2017 at 7:56 pm
        
        So far, as far as I know, there’s no voice capability in EM7455 firmware.
Sir Dec on May 25, 2017 at 2:33 am

Hi !

Wonderfull ! I was looking for such thing !

Just a question: is it possible to unlock a Lenovo ? Because i’m in Morocco for a while and it’s not working here. And I don’t know why my SIM carte is written “Lock SIM card : Locked”… And “Mobile Number” is blank, but I’ve got one ! Everything’s work with a phone but nothing with the Lenovo…

Maybe you could help me ?

Reply
Serge on June 2, 2017 at 5:34 am

zukota,

correct link to the Bjorn Mork’ page differs a bit: http://www.mork.no/~bjorn/MC7455-fix.txt

Reply
josh on July 15, 2017 at 12:48 pm

Need helps for lenovo em7455. big pain to switch em7455 to generic FW. after installed Sierrra or lenovo driver for lenovo em7455 in no-lenovo win10 pc, my device manager only showed ” Sierra Wireless EM7455 Qualcomm® Snapdragon™ X7 LTE-A QDLoader port (com3) ” have the ! On them with error code 10 (not start). When i try to update other drivers it says they are up to date. Its also listed with the same error 10.In skylight it says no connection so no way open AT command. Someone told only can flash it in linux. Found this link to enable com ports ( the first method). tried to connect em7455 in Ubuntu, nothing can see. don’t know if the em7455 works on mbim model.

./swi_usbcomp.pl showing /dev/cdc-wdm0′ is not a character device

Reply
- Johnny on December 23, 2017 at 8:21 am
  
  I have a very similar problem. I have a Dell Latitude 7370 and I installed in a lenovo em7455 from a Lenovo P50. Mine says Sierra Wireless EM7455 iQualcomm® Snapdragon™ X7 LTE-A QDLoader port (com4) ” with the same error code 10. I am in ubuntu now and ./swi_usbcomp.pl does not work.
  
  Zukota can you please help with this??
  
  Reply
josh on July 22, 2017 at 12:29 pm

fix my issue through finding one lenovo T510 laptop. switched to generic FW and MIBM model. can be recognized in non-lenovo PC. But lenovo em7455 can not link to 4G LTE, no service. test sim card fine. no idea why no connection.

Reply
Semy on September 15, 2017 at 6:34 pm

i got still problems here…please help…what is wrong here ..it is still the 9 and no way to chang it to 8…

ubuntu@ubuntu:~$ sudo -i
root@ubuntu:~# ./swi_usbcomp.pl
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg ‘0x0021’ returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
0x00 (1.5) ‘QMI_CTL’ – Control service
0x01 (1.67) ‘QMI_WDS’ – Wireless data service
0x02 (1.14) ‘QMI_DMS’ – Device management service
0x03 (1.25) ‘QMI_NAS’ – Network access service
0x04 (1.6) ‘QMI_QOS’ – Quality of service, err, service
0x05 (1.10) ‘QMI_WMS’ – Wireless messaging service
0x07 (1.3) ‘QMI_AUTH’ – Authentication service
0x08 (1.2) ‘QMI_AT’ – AT command processor service
0x09 (2.1) ‘QMI_VOICE’ – Voice service
0x0a (2.24) ‘QMI_CAT2’ – Card application toolkit service (new)
0x0b (1.45) ‘QMI_UIM’ – UIM service
0x0c (1.4) ‘QMI_PBM’ – Phonebook service
0x0f (1.0) ‘QMI_TEST’ – Test service
0x10 (2.0) ‘QMI_LOC’ – Location service
0x11 (1.0) ‘QMI_SAR’ – Specific absorption rate service
0x17 (1.0) ‘QMI_TS’ – Thermal sensors service
0x18 (1.0) ‘QMI_TMD’ – Thermal mitigation device service
0x1a (1.16) ‘QMI_WDA’ – Wireless data administrative service
0x1d (1.1) ‘QMI_CSVT’ – Circuit switched videotelephony service
0x22 (1.0) ‘QMI_COEX’ – Coexistence service
0x24 (1.0) ‘QMI_PDC’ – Persistent device configuration service
0x29 (1.0) ‘QMI_RFRPE’ – RF radiated performance enhancement service
0x2a (1.0) ‘QMI_DSD’ – Data system determination service
0x2b (1.0) ‘QMI_SSCTL’ – Subsystem control service
0x2e (1.0) ‘unknown’ –
0x30 (1.0) ‘unknown’ –
0x31 (1.0) ‘unknown’ –
0x36 (1.0) ‘unknown’ –
0xe1 (1.0) ‘QMI_RMS’ – Remote management service
0xf0 (1.0) ‘unknown’ –
0xf3 (1.0) ‘unknown’ –
0xf5 (1.0) ‘unknown’ –
0xf6 (1.0) ‘unknown’ –
QMI msg ‘0x0022’ returned status = 1
Got QMI DMS client ID ‘3’
QMI msg ‘0x555b’ returned status = 1
Current USB composition: 9
USB compositions:
0 – HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED
1 – HIP DM NMEA AT MDM1 MS NOT SUPPORTED
2 – HIP DM NMEA AT NIC1 MS NOT SUPPORTED
3 – HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED
4 – HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED
5 – HIP DM NMEA AT ECM1 MS NOT SUPPORTED
6 – DM NMEA AT QMI SUPPORTED
7 – DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED
8 – DM NMEA AT MBIM SUPPORTED
* 9 – MBIM SUPPORTED
10 – NMEA MBIM NOT SUPPORTED
11 – DM MBIM NOT SUPPORTED
12 – DM NMEA MBIM NOT SUPPORTED
13 – Config1: comp6 Config2: comp8 NOT SUPPORTED
14 – Config1: comp6 Config2: comp9 NOT SUPPORTED
15 – Config1: comp6 Config2: comp10 NOT SUPPORTED
16 – Config1: comp6 Config2: comp11 NOT SUPPORTED
17 – Config1: comp6 Config2: comp12 NOT SUPPORTED
18 – Config1: comp7 Config2: comp8 NOT SUPPORTED
19 – Config1: comp7 Config2: comp9 NOT SUPPORTED
20 – Config1: comp7 Config2: comp10 NOT SUPPORTED
21 – Config1: comp7 Config2: comp11 NOT SUPPORTED
22 – Config1: comp7 Config2: comp12 NOT SUPPORTED
QMI msg ‘0x0023’ returned status = 1
root@ubuntu:~# ./swi_usbcomp.pl –usbcomp=8
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg ‘0x0021’ returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
0x00 (1.5) ‘QMI_CTL’ – Control service
0x01 (1.67) ‘QMI_WDS’ – Wireless data service
0x02 (1.14) ‘QMI_DMS’ – Device management service
0x03 (1.25) ‘QMI_NAS’ – Network access service
0x04 (1.6) ‘QMI_QOS’ – Quality of service, err, service
0x05 (1.10) ‘QMI_WMS’ – Wireless messaging service
0x07 (1.3) ‘QMI_AUTH’ – Authentication service
0x08 (1.2) ‘QMI_AT’ – AT command processor service
0x09 (2.1) ‘QMI_VOICE’ – Voice service
0x0a (2.24) ‘QMI_CAT2’ – Card application toolkit service (new)
0x0b (1.45) ‘QMI_UIM’ – UIM service
0x0c (1.4) ‘QMI_PBM’ – Phonebook service
0x0f (1.0) ‘QMI_TEST’ – Test service
0x10 (2.0) ‘QMI_LOC’ – Location service
0x11 (1.0) ‘QMI_SAR’ – Specific absorption rate service
0x17 (1.0) ‘QMI_TS’ – Thermal sensors service
0x18 (1.0) ‘QMI_TMD’ – Thermal mitigation device service
0x1a (1.16) ‘QMI_WDA’ – Wireless data administrative service
0x1d (1.1) ‘QMI_CSVT’ – Circuit switched videotelephony service
0x22 (1.0) ‘QMI_COEX’ – Coexistence service
0x24 (1.0) ‘QMI_PDC’ – Persistent device configuration service
0x29 (1.0) ‘QMI_RFRPE’ – RF radiated performance enhancement service
0x2a (1.0) ‘QMI_DSD’ – Data system determination service
0x2b (1.0) ‘QMI_SSCTL’ – Subsystem control service
0x2e (1.0) ‘unknown’ –
0x30 (1.0) ‘unknown’ –
0x31 (1.0) ‘unknown’ –
0x36 (1.0) ‘unknown’ –
0xe1 (1.0) ‘QMI_RMS’ – Remote management service
0xf0 (1.0) ‘unknown’ –
0xf3 (1.0) ‘unknown’ –
0xf5 (1.0) ‘unknown’ –
0xf6 (1.0) ‘unknown’ –
QMI msg ‘0x0022’ returned status = 1
Got QMI DMS client ID ‘3’
QMI msg ‘0x555b’ returned status = 1
Current USB composition: 9
USB compositions:
0 – HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED
1 – HIP DM NMEA AT MDM1 MS NOT SUPPORTED
2 – HIP DM NMEA AT NIC1 MS NOT SUPPORTED
3 – HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED
4 – HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED
5 – HIP DM NMEA AT ECM1 MS NOT SUPPORTED
6 – DM NMEA AT QMI SUPPORTED
7 – DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED
8 – DM NMEA AT MBIM SUPPORTED
* 9 – MBIM SUPPORTED
10 – NMEA MBIM NOT SUPPORTED
11 – DM MBIM NOT SUPPORTED
12 – DM NMEA MBIM NOT SUPPORTED
13 – Config1: comp6 Config2: comp8 NOT SUPPORTED
14 – Config1: comp6 Config2: comp9 NOT SUPPORTED
15 – Config1: comp6 Config2: comp10 NOT SUPPORTED
16 – Config1: comp6 Config2: comp11 NOT SUPPORTED
17 – Config1: comp6 Config2: comp12 NOT SUPPORTED
18 – Config1: comp7 Config2: comp8 NOT SUPPORTED
19 – Config1: comp7 Config2: comp9 NOT SUPPORTED
20 – Config1: comp7 Config2: comp10 NOT SUPPORTED
21 – Config1: comp7 Config2: comp11 NOT SUPPORTED
22 – Config1: comp7 Config2: comp12 NOT SUPPORTED
QMI msg ‘0x0023’ returned status = 1
root@ubuntu:~# ./swi_usbcomp.pl –reset
Running in MBIM mode (driver=cdc_mbim)
MBIM OPEN succeeded
QMI msg ‘0x0021’ returned status = 1
MBIM QMI support verified
supports 33 QMI subsystems:
0x00 (1.5) ‘QMI_CTL’ – Control service
0x01 (1.67) ‘QMI_WDS’ – Wireless data service
0x02 (1.14) ‘QMI_DMS’ – Device management service
0x03 (1.25) ‘QMI_NAS’ – Network access service
0x04 (1.6) ‘QMI_QOS’ – Quality of service, err, service
0x05 (1.10) ‘QMI_WMS’ – Wireless messaging service
0x07 (1.3) ‘QMI_AUTH’ – Authentication service
0x08 (1.2) ‘QMI_AT’ – AT command processor service
0x09 (2.1) ‘QMI_VOICE’ – Voice service
0x0a (2.24) ‘QMI_CAT2’ – Card application toolkit service (new)
0x0b (1.45) ‘QMI_UIM’ – UIM service
0x0c (1.4) ‘QMI_PBM’ – Phonebook service
0x0f (1.0) ‘QMI_TEST’ – Test service
0x10 (2.0) ‘QMI_LOC’ – Location service
0x11 (1.0) ‘QMI_SAR’ – Specific absorption rate service
0x17 (1.0) ‘QMI_TS’ – Thermal sensors service
0x18 (1.0) ‘QMI_TMD’ – Thermal mitigation device service
0x1a (1.16) ‘QMI_WDA’ – Wireless data administrative service
0x1d (1.1) ‘QMI_CSVT’ – Circuit switched videotelephony service
0x22 (1.0) ‘QMI_COEX’ – Coexistence service
0x24 (1.0) ‘QMI_PDC’ – Persistent device configuration service
0x29 (1.0) ‘QMI_RFRPE’ – RF radiated performance enhancement service
0x2a (1.0) ‘QMI_DSD’ – Data system determination service
0x2b (1.0) ‘QMI_SSCTL’ – Subsystem control service
0x2e (1.0) ‘unknown’ –
0x30 (1.0) ‘unknown’ –
0x31 (1.0) ‘unknown’ –
0x36 (1.0) ‘unknown’ –
0xe1 (1.0) ‘QMI_RMS’ – Remote management service
0xf0 (1.0) ‘unknown’ –
0xf3 (1.0) ‘unknown’ –
0xf5 (1.0) ‘unknown’ –
0xf6 (1.0) ‘unknown’ –
QMI msg ‘0x0022’ returned status = 1
Got QMI DMS client ID ‘3’
QMI msg ‘0x555b’ returned status = 1
Current USB composition: 9
USB compositions:
0 – HIP DM NMEA AT MDM1 MDM2 MDM3 MS NOT SUPPORTED
1 – HIP DM NMEA AT MDM1 MS NOT SUPPORTED
2 – HIP DM NMEA AT NIC1 MS NOT SUPPORTED
3 – HIP DM NMEA AT MDM1 NIC1 MS NOT SUPPORTED
4 – HIP DM NMEA AT NIC1 NIC2 NIC3 MS NOT SUPPORTED
5 – HIP DM NMEA AT ECM1 MS NOT SUPPORTED
6 – DM NMEA AT QMI SUPPORTED
7 – DM NMEA AT RMNET1 RMNET2 RMNET3 NOT SUPPORTED
8 – DM NMEA AT MBIM SUPPORTED
* 9 – MBIM SUPPORTED
10 – NMEA MBIM NOT SUPPORTED
11 – DM MBIM NOT SUPPORTED
12 – DM NMEA MBIM NOT SUPPORTED
13 – Config1: comp6 Config2: comp8 NOT SUPPORTED
14 – Config1: comp6 Config2: comp9 NOT SUPPORTED
15 – Config1: comp6 Config2: comp10 NOT SUPPORTED
16 – Config1: comp6 Config2: comp11 NOT SUPPORTED
17 – Config1: comp6 Config2: comp12 NOT SUPPORTED
18 – Config1: comp7 Config2: comp8 NOT SUPPORTED
19 – Config1: comp7 Config2: comp9 NOT SUPPORTED
20 – Config1: comp7 Config2: comp10 NOT SUPPORTED
21 – Config1: comp7 Config2: comp11 NOT SUPPORTED
22 – Config1: comp7 Config2: comp12 NOT SUPPORTED
QMI msg ‘0x0023’ returned status = 1
root@ubuntu:~# sudo ls -la /dev/cdc*
crw——- 1 root root 180, 0 Sep 15 10:00 /dev/cdc-wdm0
root@ubuntu:~# sudo dmesg | grep cdc
[ 16.828322] usbcore: registered new interface driver cdc_ncm
[ 16.846467] usbcore: registered new interface driver cdc_wdm
[ 16.921110] cdc_mbim 1-2:1.12: cdc-wdm0: USB WDM device
[ 16.921270] cdc_mbim 1-2:1.12 wwan0: register ‘cdc_mbim’ at usb-0000:00:14.0-2, CDC MBIM, 72:ca:8a:44:2f:36
[ 16.921290] usbcore: registered new interface driver cdc_mbim
[ 16.983846] cdc_mbim 1-2:1.12 wwp0s20f0u2i12: renamed from wwan0
root@ubuntu:~#

Reply
- Pash on December 19, 2017 at 11:14 pm
  
  I have the same problem with carbon x1
  
  Reply
Dmitry on February 21, 2018 at 6:06 pm

Thanks a lot for the article!

Small note: if you’re already on linux, you can grab the script swi_setusbcomp.pl from here https://git.mork.no/wwan.git/plain/scripts/swi_setusbcomp.pl

Then, in case of Ubuntu Xenial, install a couple of packages:

sudo apt install libuuid-tiny-perl libipc-shareable-perl

And just run that script.

Reply
Dmitry on March 21, 2018 at 10:56 pm

Hi zukota,

First of all, thanks a lot for all your efforts, I appreciate it so much!

Right now I’m having troubles making my em7455 to work on Ubuntu 16.04 (tried on 18.04 beta as well), and firstly I successfully switched the mode to 8 (DM NMEA AT MBIM) using your script. The modem registers in the network fine, however I still was unable to connect (journalctl -f was saying that the reason is “unknown”), and I’ve read a few other suggestions to use QMI instead of MBIM, so I tried to switch to mode 6 (DM NMEA AT QMI). It switched fine, then I resetted it, and since that, the modem doesn’t even register in the network. Even more, when I run your script without arguments, it says “Failed to verify QMI”:

$ sudo ./swi_setusbcomp.pl
Running in QMI mode (driver=qmi_wwan)
Failed to verify QMI

There are a few serial ports for the modem, and I can successfully communicate with it (e.g. I can type AT!ENTERCND="A710" and it responds with OK), but as I said, it doesn’t register in the network and I’m not even able to switch back to MBIM due to the error above.

If you could share any ideas on how it could be fixed, I’d be very happy.

Thanks!

Reply
John on April 10, 2019 at 3:41 am

I am attempting this proccess on getac tablets with Windows 10. The first 4 worked no problem. The last 2 change to usbcomp=8 in unbuntu but as soon as windows boots it changes back to usbcomp=9. I’ve tried doing a full wipe if the tablet, ran threw the process numerous times and still no luck. Any ideas?

Reply
- zukota on March 29, 2020 at 8:52 am
  
  You need to remove any EM7455 drivers in Windows you might have installed. Those drivers are actually a whole lot more trash than just drivers, it includes several programs running in background and changing composition on boot. You DO NOT neet to have any drivers installed, as EM7455 will work with Windows 10 by default.
  
  Reply