Custom ROMs offer several advantages over stock firmware:
You did not flash the persist partition correctly. nokia 7.2 custom rom
If you own a Nokia 7.2 (codenamed "Dragon"), installing a custom ROM is the single best way to extend its lifespan, boost performance, and unlock features HMD never intended for you to have. Here is a deep dive into why you should flash a custom ROM and which ones are worth your time. Custom ROMs offer several advantages over stock firmware: