Huawei Mate 10 Lite RNE-L21 Downgrade Firmware 330 (Europe) - Ministry Of Solutions
Mate 20 lite : Downgrade or bypass frp ? | XDA Forums
I have written a guide on how to downgrade Huawei phones to previous EMUI versions. If I am missing any method that is more efficient in downgrading feel free to comment. :
huawei-downgrade to Android 10 || how to downgrade android 10 to 9 || rollback emui update - YouTube