Some little technical blog


How to revive your bricked Sierra Wireless EM7345

BrickedWhen playing with some EM7345 AT commands I was able to permanently bring the device down. Yes, THERE IS at least one AT command that can brick your EM7345 beyond repair! But not anymore, I found a way to revive a bricked EM7345 back to normal.

I’m going to publish some interesting information about that AT command in one of my following posts, as it’s really worth it, since it’s related to the infamous Carrier IQ scandal. Hey Intel, are you spying on us too?

But first things first, now I’m going to explain how to get your bricked EM7345 back to normal.

WARNING: The method described in this post is only applicable to EM7345 devices installed in Lenovo laptops! Lenovo tablets have another hardware subtype of EM7345 and the firmwares for laptop and tablet are not mutually compatible! Don’t ever try to crossflash!

This method is only applicable for the symptoms described below. If your circumstances are different, don’t try this method!

Sometimes your EM7345 can die with the following symptoms:

  • The device “Sierra Wireless EM7345 4G LTE” is not shown in Device Manager
  • AT COM ports and GNSS sensor device are not shown in Device Manager
  • Instead, a new USB device, named “Intel(R) USB Flash Loader Utility” is shown in Device Manager Intel Flash Loader
  • The above device is constantly disappearing and reappearing again, and Device Manager is “refreshing” on its own every 2-3 seconds
  • Intel Firmware Updater doesn’t recognize the device at all and you can’t flash it
  • Rebooting, detaching the battery, removing the EM7345 from the laptop, enabling or disabling that Intel USB device in Device Manager doesn’t help. The device is not recognized by Windows, you cannot use it anymore

Bricked for good, you’d say. But, there’s a way now.

Download and unzip the following file: FlashTool

Go to the unzipped folder and run “FlashTool_E2.exe”.

Infineon Flash ToolPress “Add” button and find a correct firmware file for your EM7345. On the picture above, I’m using 1415.07 firmware, you can also use 1415.09 or any other firmware. The firmware must be in FLS format! You can find EM7345 FLS firmwares in the folder “c:\ProgramData\Intel\MBIM Toolkit\FirmwareDatabase\PreInstalled” if you have Lenovo drivers installed.

Set everything as shown on the picture. All ticks, baud rate, channels, communication driver, especially erase settings!

Then notice the VID and PID of that Intel USB device in Device Manager.

Flash Loader ID

The VID is 8087 and PID is 0716 here.

Open Flash Tool E2 File-> USB Map Wizard:

Flash Tool USB Map Wizard

Make sure USB Detection String has the same numerical IDs as your Intel Flash Loader USB device in Device Manager! Correct it if necessary, and press Next button. The next time Device Manager “refreshes” itself, the device will be shown in the list as Detected. Press Done button.

Flash Tool Detected

Now, you’re ready. Double check all the settings in the Flash Tool and press Next button. It will show the following window:

Flash Tool Ready1

All you have to do now is just press “Start USB1” button. In a few seconds your Em7345 will be recognized, erased and then reflashed. After it’s done you should see a message that all went well and completed 100% without errors. Then you can check again in Device Manager and make sure that Intel USB Flash Loader Utility is shown steadily and is not disappearing like before. Device Manager should not also constantly “refresh” itself. If it’s so, just turn off your Lenovo laptop now and disconnect the power cord. The idea here is to power off EM7345 completely.

Next, power on the laptop again and your EM7345 should be back up and running as before. It will be shown in Device Manager, AT ports will be back, so will be the GNSS sensor.

Congrats, you just revived your bricked EM7345!

And sometimes, it’s necessary to reflash your newly restored EM7345 again, using Intel Firmware Updater this time. This is needed when you get odd connection errors or AT+XLOG showing lots of errors. Intel Firmware Updater accepts only FLZ files, not FLS, so make sure you do it accordingly. Refer to this post for instructions. After I reflashed my EM7345 the second time, I saw no more errors added to AT+XLOG error log.

Sierra Wireless EM7345 AT commands


AT commands are very helpful for troubleshooting your device and changing the settings that are not available from standard Windows settings. For example, you can choose the access technology – 2G, 3G, 4G and even stick to particular frequency bands.

EM7345 is using Intel (formerly Infineon) AT command set and it’s not compatible with Quallcomm AT command set. All basic AT commands like AT+CFUN are more or less the same for all 3G/4G devices, but advanced ones, starting from AT+X, are unique to Intel XMM platform devices.

No official documentation for AT commands was released by Intel, all I was able to find is some source code fragments for Samsung phones (that are based on the earlier XMM platform, like XMM 6380, or so)  on GitHub.

To use AT commands, first you have to enable EM7345 AT command port, as I described in this post.

There are many cases when your newly installed EM7345 doesn’t work. Let’s start step by step.


should return: +CFUN: 1,0

1 means the device is turned on. If it’s not 1, make sure your EM7345 is turned on in Windows Connection Manager. Or try to turn it on using the AT command:


Let’s check if the SIM card is working and recognized by the EM7345:


should read from your card and display your IMSI number.

Check your SIM card status:


should return: +CPIN: READY. That means your SIM card is properly recognized and no SIM card PIN is required to enter.

Let’s check if your EM7345 is SIM locked:


should return +CLCK: 0

0 means your device is not locked and can work with any SIM card. If it is 1, then bad luck, your EM7345 is SIM locked and will work only with SIM card of the operator it is locked to.

Let’s check which access technology is currently used:


returns something like +XREG: 0,8,BAND_LTE_20,0

it means your device is currently using LTE, frequency band 20. For 3G, the band will be BAND_UMTS_I, for example. That means 3G band I. All actual band frequencies you can find in Google.

How to change the access technology?


where n is: 0 – for 2G (EDGE), 1 – for 3G, 2 – for 4G/LTE.

You can also check your current access technology configuration:


response: +XACT: 0,0,,900,1800,1900,850,1,2,4,5,8,101,102,103,104,105,107,108,113,117,118,119,120

the first number is n number above. Then come numbers 900,1800,1900,850. Those are bands currently enabled for 2G technology. So the configuration is to use only 2G, and use the above bands. If the band is not listed, it won’t be used by the EM7345. This is very useful when you want to stick to only one access technology and even some particular band. Then we see numbers 1,2,4,5,8. Those are 3G bands. And finally, numbers starting from 101 and up to 120. Those are 4G/LTE bands. 101 means LTE band 1, 102 stands for LTE band 2 and so on.

How do we set the bands? For example to use only LTE band 20, use the following command:


To stick to LTE  bands 7 and 20, use:


You get the idea.

What about automatic selection of access technologies? For example in some areas where 4G is not avaialble and you want the device to use 3G and then go back to 4G when you’re back  to the coverage? Use this:


That tells your device to use all access technologies and the bands listed in the command (6 number) with the priority of 4G/LTE. This is the default factory EM7345 setting. What 2 and 1 numbers mean I don’t know yet.

If your SIM card seems to be ok, but you cannot get a working connection, try to check for connection errors:




Each of it will get you some text error report if your EM7345 cannot connect to a network.

Your device frozen or you get “1 CDC error”? No need to reboot your laptop, just use:


This will reboot your EM7345, and it will reappear in Device Manager shortly.

Want to check your EM7345 for internal errors? Use:


This will list all recorded errors (exceptions). Firmware version 1.1 had some bugs, and every time “1 CDC” error appeared, it got logged and appeared in this list. Since version 1.2 (1415.09) I see no errors in this log.

To clear this list of errors, use:



Sierra Wireless EM7345 – an easier method to update firmware


WARNING!!! The instructions in this post are applicable only to EM7345 installed in Lenovo laptops!! For example, models T440, X240, X1 Carbon 2nd and 3rd gen, X250. For tablets or other devices don’t use the firmware given in this post, you can brick your EM7345!

Finally, I was able to figure out what *.flz files actually are! EM7345 Intel firmware updater asks for *.flz files when you want to flash the firmware. But there were none available, only *.fls files, which Intel firmware updater doesn’t accept. If you have a flz file, you can flash your EM7345 without editing out xml files and rebooting your laptop. Just open a flz file in the updater and you’re good to go!

A flz file is just a zipped fls file together with an xml description file. For example, if you want to flash FIH7160_V1.2_WW_01.1415.09_NAND.fls firmware, just do the following:

Create FLSInformation.xml file with the following contents:

MCC and MNC values in the file are not important, you can put any value.

Then zip these two files, FLSInformation.xml and FIH7160_V1.2_WW_01.1415.09_NAND.fls together. Rename the zip archive to FIH7160_V1.2_WW_01.1415.09_NAND.flz. Now you can launch Intel Firmware updater, click “Add firmware” and it will be recognized and showed in the list.


Then you can click “Update Firmware” and that’s it!

Note if you put different MCC and MNC values than your currently installed SIM card, you will get a warning from the updater saying that the firmware does not match your device. Ignore the warning if you know what you are doing and you really want to flash that version. Alternatively, use MCC and MNC values to match your SIM, and there will be no warning shown.

You may find this method of having a flz file a lot easier in order to update your EM7345 firmware, no need to edit xml files and reboot any more, and the updating process is now visual and straight forward. Enjoy.

New Sierra Wireless EM7345 firmwares available

Yesterday I’ve been checking on Lenovo drivers website and have noticed that they added the X250 model. And what did I find there? Sierra Wireless EM7345 Software for Windows 8.1 (32-bit, 64-bit) – ThinkPad version 1.11.10610.4225 , released on 12/16/2014 . So Lenovo doesn’t update WWAN drivers for their “old” models, like X240 or T440 and the latest drivers out there are dated July 31. So I downloaded it, unpacked it and found the following EM7345 firmwares inside:


  • FIH7160_V1.1_WW_01.1410.13_AT_NAND.fls version 1.1 (1410.13) for AT&T (United States only) dated 2014-May-19 12:32:21
  • FIH7160_V1.2_WW_01.1415.07_NAND.fls version 1.2 (1415.07) Worldwide dated 2014-Jun-5 11:54:58. This is the version I had flashed into my EM7345, as described in this post
  • FIH7160_V1.2_WW_01.1415.09_NAND.fls version 1.2 (1415.09) Worldwide dated  2014-Oct-22 17:47:10. Seems to be an update for 1415.07.
  • FIH7160_V1.2_WW_01.1442.04_VZ_NAND.fls version 1.2 (1442.04) for Verizon (United States only) dated 2014-Nov-20 11:23:44

Of course I couldn’t resist and flashed the new firmware FIH7160_V1.2_WW_01.1415.09. Everything seems to work fine.

I didn’t dare to flash Verizon or AT&T version, even though Verizon seems to be the latest, compiled on 2014-Nov-20. US operators love to SIM lock their devices, and those firmwares can be locked. Unless you are in the US and your network is Verizon/AT&T or you just don’t care, I cannot recommend to flash those AT&T and Verizon firmwares.

How to flash it? Just put file FIH7160_V1.2_WW_01.1415.09_NAND.fls into the folder “c:\ProgramData\Intel\MBIM Toolkit\FirmwareDatabase\PreInstalled” (first you have to have the EM7345 drivers installed as desrcibed in this guide ) and make changes to file “c:\ProgramData\Intel\MBIM Toolkit\FirmwareDatabase\PreInstalled\FLSInformation.xml”. But this time use FIH7160_V1.2_WW_01.1415.09_NAND.fls instead of FIH7160_V1.2_WW_01.1415.07_NAND.fls when editing the xml and you’re done.

After reboot, you will be prompted by the Intel firmware updater:


Press Yes and you’re set! Interestingly, VID/PID weren’t reset to their default values so I had no need to restore them. Also GNSS and AT ports were not affected at all, and continued to work just fine.

I’d like to know what new features and bug fixes are brought by the updates, but (as usual) we have no information, no change logs… I’m not using my EM7345 much these days, but if you guys notice something new in this update, feel free to let me know.


Sierra Wireless EM7345: How to flash the latest firmware


WARNING!!! The instructions in this post are applicable only to EM7345 installed in Lenovo laptops!! For example, models T440, X240, X1 Carbon 2nd and 3rd gen, X250. For tablets or other devices don’t use the firmware given in this post, you can brick your EM7345!

Unfortunately, the default factory EM7345 firmware version  (1.1) has some bugs. For example, after connecting to a LTE network and then disconnecting manually, the network status of the connection was changing for me to “No service” until device restart. Also, the device often disappears from Device Manager and reappears there with the name “1 CDC” and does not work until you disable and then enable it again in Device Manager. All those issues are caused by some bugs in EM7345 firmware.

But there is a newer version of firmware, namely 1.2, where the above bugs are fixed. But by default, you cannot flash it, because firmware updating is supposed to work unattended. And this is not nice of Intel and Lenovo. The users must be able to do firmware updating when they need or want it! Bad, bad Lenovo, very bad! 🙂

And that’s where old good Zukota comes in again.

Here’s the instructions of how to flash your EM7345 to the latest version:

Make sure you’re using Windows 8 or 8.1

Go to the control panel and uninstall Sierra Wireless EM734x 4G LTE Software from Program and Features.

Reboot your laptop.

Download and install the latest EM7345 driver package from the Lenovo website. This package already includes the 1.2 firmware, but by default it’s never going to be flashed into your EM7345, unless you live in some specific country.

Find the file “c:\ProgramData\Intel\MBIM Toolkit\config\Config.xml” and open it in any text editor. Find the following string in the file: “<SilentAutoFWUpdate>true</SilentAutoFWUpdate>” and change “true” to “false”.  Also check that the string “<FirmwareSysTray>true</FirmwareSysTray>” is set to “true” and set it to “true” if it’s not.

Make sure after you edit the file contents is the following:

Now, reboot your laptop.

After reboot, you will notice  a new icon in the system tray for Intel firmware updater service:


Don’t proceed if you don’t see this icon.

Double click the icon to bring up the Intel firmware updater utility.



Notice the highlighted area. You should see your country and cellular operator listed there. Also check “Home Provider ID” value. It should contain a 5-digit code, for example “26299”. If you don’t see any data shown, make sure your SIM card is inserted and you can see your cellular provider name in Windows 8 Connections Manager.

Don’t proceed if you don’t see Home Provider ID, your county and your operator name!

Now, find and open in a text editor the following file: “”c:\ProgramData\Intel\MBIM Toolkit\FirmwareDatabase\PreInstalled\FLSInformation.xml”. Scroll to the very end of it and before </FLSImageList> string insert the following text:

where MCC is the first 3 digits of the code shown in “Home Provider ID”. If your code is 26299, then MCC must be 262. MNC is the last 2 digits of the code, if your code is 26299, then your MNC must be 99.

Make sure the end of the file with your added data looks like this:

Save the file and reboot your laptop.

After reboot, wait for some time until you get a prompt from Intel firmware updater to update your firmware. Press “Yes” and the firmware update progress will begin!


It should complete in a few seconds, maybe 10-20. After the process is done and the updater says so, wait for a couple of minutes. Don’t reboot your laptop.

After the updating is done, your EM7345 can appear in Device Manager with a different name, and AT and GNSS ports can be gone, and VID/PID can be reset again to bad values. You will need to reinitialize your EM7345 again, as described in this post.  If you want to also get back your AT and GNSS ports, refer to this post.

If you have AT ports enabled, check the version of firmware:

The version should read as 1.2 now. If so, you have successfully updated your EM7345 to the latest available firmware. I personally noticed that “1 CDC” bug is gone, and LTE connecting and reconnecting works fine now. I also can observe a very rare bug when my EM7345 is shown with an exclamation mark in Device Manager after the laptop wakes up from sleep, but I use to fix that by disabling it in Device Manager and enabling it again. Other than that, there are no bugs and LTE works like a charm 🙂

Does anyone know if there’s a newer than 1.2 firmware for EM7345? Lenovo or Intel, can you answer? Lenovo users would like to see ALL bugs fixed 🙂 Hahaha.

How to enable AT command and diagnostic ports and GPS for Sierra Wireless EM7345


Sometimes it’s useful to know what’s going on under the hood. Almost all modern 3G and 4G modules offer an AT command interface to run AT commands.

What can you do using AT commands? To name just a few:

  • Check cellular signal strength
  • Lock your EM7345 to use only 2G, 3G, or 4G if you have such a need
  • Check for some problems, for example if your newly bought EM7345 is SIM-locked to some provider
  • Reboot your EM7345 without rebooting Windows
  • Check what’s wrong if your EM7345 doesn’t connect to a cellular network

Also, the EM7345 includes a fully functional GPS device! With active antennas connected inside your Lenovo laptop!

Unfortunately, out-of-the-box EM7345 comes with only MBIM interface enabled, all AT ports are switched off by default. GPS is also switched off and there are no standard means to enable it! Shame on you Lenovo! Why you restrict us, buyers of your laptops, to use all features and potential of hardware we bought from you? Do you think GPS is not important?

But OK, this is where we come in! To enable AT command port and GPS on your EM7345, do the following:

  • Ensure you’re running Windows 8 or Windows 8.1. Windows 7 can use AT and GPS too, but to enable it, you must be running Windows 8!
  • Ensure you have the latest EM7345 drivers installed from Lenovo website.
  • Ensure your EM7345 is visible in Device Manager with the correct VID/PID identificators. See the picture


When the above requirements are met, download and run this file: EM7345_MBIM_ACM

Wait a minute and then check your Device Manager again. You will notice three new devices:

  • Sierra Wireless EM7345 AT Port
  • Sierra Wireless EM7345 Trace Port
  • Sierra Wireless GNSS Sensor EM7345 4G LTE


Congratulations! Now you have fully enabled GPS in your Lenovo laptop ready to work with built-in Windows 8 Maps, also you can make it work with any NMEA-compatible GPS software for Windows. Also you have your AT command ports enabled. Download putty and open your corresponding COM port in putty. In this picture example, my COM port number is COM7:


And press “Open”.

In the opened window, type:


You should have a reply from your EM7345:

Congratulations! Your AT port is now working and you can query your EM7345 with AT commands. The above command asks for a device firmware version, it is FIH7160_XMM7160_V1.2_MBIM_GNSS_NAND_REV_4.5 2014-Jun-5 11:54:58 in my case, the latest one.


You can do a lot more things with your EM7345 using AT commands, and in my next posts I will give some more very useful examples.

Sierra Wireless EM7345 initial setup

em7345   Recently I bought this all-band LTE 4G card for my Lenovo X240 laptop. Unfortunately, Lenovo X240 BIOS contains a whitelist of allowed 4G devices, and EM7345 is the only solution officially available for European LTE bands.

Device specifications:

  • Chipset: Intel XMM7160
  • LTE bands:  B1, B2, B3, B4, B5, B7, B8, B13, B17, B18, B19, B20 (12 bands total). This is awesome as the device is really ready to work world-wide.
  • Form factor:  m.2
  • Platform: Intel X-Gold, Software is based on ThreadX RTOS.

Nothing much is known about this Intel XMM7160 chipset. Actually, Intel bought Infineon some time ago and this device appears to be very similar to Infineon models. AT command set is not compatible with Quallcomm and everything is organized differently. In this post, I’m going to explain how to get this device working on Windows and how to do the initial setup.

First, If you bought EM7345 from China, like I did,  you may find that once you installed it in some Lenovo laptop, the system refuses to boot!

lenovo_wlBut why is this happening? Isn’t the EM7345 an officially certified device for Lenovo X240, Lenovo T440, etc? Yes and no.  Just check the Vendor and Device ID if you see this screen when you turn your laptop on. Chances are it reads (8087/0911).  In this case, like I did, you received your device directly from Chinese factory and it’s not initialized with correct ID yet. What can you do to boot up successfully:

  • EM7345 is an USB device and it is slow to initialize when turned on. You can switch off the power of your laptop then quickly turn it on again.
  • Some people reported after they flashed a new or old BIOS, the system allowed them to boot successfuly. Try that.
  • You can use some other laptop with a m.2 slot to “initialize” your EM7345. Once it is initialized, you can put it back in your Lenovo laptop and it will boot up just fine without this dreaded screen.
  • If you have no other laptop, you can insert EM7345 into your Lenovo after you booted into Windows. Since it is an USB device, no harm should be done with hot plugging it. But be very careful doing that! I never tried this myself and can’t recommend this method!

Now you are booted into Windows 8. Yes, the device can be initialized and its Vendor and Device IDs changed in Windows 8 only. Windows 7 won’t work since it has no drivers allowing you to change the ids. Again, you only need Windows 8 or 8.1 !

Open your device manager and find your EM7345 there. It should be listed there with a name similar to “CDC” or something like that. Also possible names include “Microsoft Mobile Broadband device”.  Open that device properties and make sure the device id strings are 8087/0911. Click “Details” tab and select “Hardwsre Ids”. The string should look like or begin with:  PCI\VEN_8087&DEV_0911.

Now you can download and install the drivers for EM7345 from the Lenovo website.

After you’re done installing, it’s time to initialize the device so it’s accepted by Lenovo BIOS.

Download and run the following file:  EM7345_MBIM_only. Allow it to do its work and wait for 10-15 seconds.

After that, go back to the Device Manager. Your 4G card should now look like this:

em7345-dm1 em7345-dm2

Notice that the device name has changed to Sierra Wireless EM7345 4G LTE and vendor and device ids are now 1199 and A001, respectively. Now you can reboot your Lenovo laptop or you can put your EM7345 back into your Lenovo (if you were doing the above procedure on a different laptop) and the BIOS will never complain again while booting!

If you like Windows 7, you can start using it from now on, since the device has the correct Vendor and Device ID. Just use the above drivers from Lenovo for your EM7345.

In my next post I’m gonna show you how to enable GPS and AT diagnostic port on your EM7345.  AT port is a convenient way of receiving some technical info about your EM7345 and also operating it. You can lock your device into using only 2G, 3G or 4G and do some other useful things.