Ml7820 B Firmware |work| -

No. The baseband firmware is proprietary and signed by Fibocom. Open-source alternatives (like OsmocomBB) do not support LTE modules.

Some older firmware versions (pre-11.810.08.xx) have a nasty bug where disabling the RF stack causes the entire module to hang until a hard power cycle. ml7820 b firmware

Flashing the wrong region's firmware can zero out your IMEI, effectively making the module illegal to use on any mobile network. ml7820 b firmware