ELI5 What is the firmware that every custom ROM requires.

[faengarm]

So as I took a look any rom that is not based on OOS requires us to flash the firmware. The first time I flashed a custom ROM I haven't done that yet everything was working fine. Could someone explain what those firmwares are, what is included in them and why are they necessary ?

 

[strongst]

So as I took a look any rom that is not based on OOS requires us to flash the firmware. The first time I flashed a custom ROM I haven't done that yet everything was working fine. Could someone explain what those firmwares are, what is included in them and why are they necessary ?

The firmware is provided by oos and there's ota updates hence with the original based roms. They are mostly needed to provide latest drivers for the hardware like modem etc.

 

[faengarm]

The firmware is provided by oos and there's ota updates hence with the original based roms. They are mostly needed to provide latest drivers for the hardware like modem etc.

Oh so it was just a matter of time until I would find something breaking. Is it possible to dirty flash these firmwares or should I wait for ROM updates before doing that ?

 

[strongst]

Oh so it was just a matter of time until I would find something breaking. Is it possible to dirty flash these firmwares or should I wait for ROM updates before doing that ?

They are available seperately https://forum.xda-developers.com/oneplus-5/how-to/firmware-modem-collection-flashable-zips-t3627049