Telit firmware upgrade results in unresponssive LE901C4-NF

On Sixfab connect, my firmware was listed as Unknown. So I tried to use the firmware update process and it is no longer responsive in that process. If I try lsusb it shows up as
Bus 001 Device 007: ID 18d1:dood Google Inc. Xiaomi Mi/Redmi 2 (fastboot).

Curious - where did you source your firmware?

I believe I got it from Sixfab’s website. Life’s been crazy. I can barely remember anything.
In going back to find it, I see they have the firmware taken down at the moment. The name of the zip folder I downloaded was:
LE910C4-NF_25.21.660_CUST_118_perf_TFI

I also used Telit driver installer:
Telit_Windows_10_WHQL_Drivers_Installer_2.14.0001

Also not sure where I got it.

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