Mi 10t pro custom ROM

[NisseA]

Hi.
Is it possible to install a custom ROM on my phone and is it possible without using a computer or a second device?
I've done custom roms before but would be helpful if it's possible that it has step by step too!

 

[Igor Eisberg]

it's not possible to flash a custom ROM without a computer.
Even if TWRP is available, you need a computer to flash it for the first time.