EM7421 firmware upgrade

IoT Modules MC/EM Series
1

Hi,

We have bunch of machines with EM7421 modems that sometimes experience mysterious communication breaks for which we have been unable to find any cause.

But looking at modems with ATI-command I get:

Manufacturer: Sierra Wireless, Incorporated
Model: EM7421
Revision: SWI9X50C_01.14.03.00 b06bd3 jenkins 2020/09/23 10:53:35

So the firmware is oldish, making me think about updating it.
It seems that there are versions 1.14.22.00 and 1.14.13.00 available for download.

I had a look at Linux fw-download-tool which is the utility to use here as far as I understand
and the process looks quite straightforward. Anything I should take in account before
updating or shall I just go and do it ?

2

You can just upgrade the firmware after installing the MBPL USB drive

3

Drivers in stock Debian are not valid for this ? So drivers from MBPL are required ?

4

I don’t know, you can give a try