RM520N-GL and fastboot firmware update

I see that there is a command AT+QFASTBOOT that can reboot RM520N-GL module into fastboot mode. Is it possible to update module firmware without qfirehose/qflash utility using fastboot utility only?

Dear @Kamil_Zaripov1
Our module need to use Qfirehose and Qflash to upgrade.

And what AT+QFASTBOOT is used for?

I’m thinking so.
Most likely:
Fastboot flash partition /path/to/UBI

I’m not 100% on this though, plus you’d have to know what you need to flash for each module. This is something I want to dig into myself eventually I just haven’t had the time lately.

Custom DFOTA generation is also something I want to look into. Hopefully it’s as easy as simply modifying the basefiles to include what you want. I’m not too sure about that either though there’s probably some sort of signature check when generating it.

Dear @Kamil_Zaripov1
It used for RG520NGLAP module to enter fastboot mode to debuging.
Please check your OC.

Ok, so fastboot is required only for some debugging.

Please check your OC.
I do not know what “OC” is.