Sierra Wireless EM7445: A dead-born king

As a natural development of their previous XMM7160 LTE chipset, Intel presented a new generation, named XMM7260. It was announced about 2 years ago and only now some first real devices made it to customers. XMM7260 supports more LTE bands than XM7160 and also supports LTE carrier aggregation. It conforms to LTE Cat.6.

The following LTE bands supported: 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 29, 30, 38, 41.

Wow, that’s 18 LTE bands supported!

The following LTE bands supported with carrier aggregation: 1+5, 8, 18, 19, 26; 2+4, 5, 13, 17, 29; 3+5, 8, 19, 20, 26; 4+5, 13, 17, 29; 7+20; 4+4.

That technical details look very good and I was desperate to test the new Sierra Wireless EM7445. Below is my review.

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All Sierra Wireless EM7345 firmware

This is the page with all Sierra Wireless EM7345 firmware released so far. All firmware on this page is in FLZ format. To flash it, use Intel M.2 Firmware Updater Tool from the LATEST EM7345 driver package on Lenovo Support Site. If you need to flash using Infineon Flash Tool E2 (i.e. for unbrick or emergency recovery), extract FLS file from the corresponding FLZ file. FLZ file is just a renamed ordinary ZIP file, so you can use whatever ZIP compatible software to extract it.
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How to revive your bricked Sierra Wireless EM7345

When 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.

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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.
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