Turn off your phone, then hold Volume Up + Power to enter TWRP recovery.
Open and enable OEM Unlocking and USB Debugging .
strings system.img | grep ro.build.fingerprint huawei nmol31 custom rom verified
Flashing custom ROMs will wipe your data. You must back up your photos and files first.
Requires manual fix for audio (via vendor overlay ). A verified guide exists on GitHub (search "NMOL31 audio fix GSI"). Turn off your phone, then hold Volume Up
Before downloading any files, you must understand the technical limitations of this specific hardware.
The most "verified" stable build from the enthusiast community remains LineageOS 14.1 (Android 7.1.2), developed primarily by Team OpenKirin. Modern Compatibility: You must back up your photos and files first
Installing a custom ROM may void your device's warranty and may cause data loss. Proceed with caution and at your own risk.
Go to , locate the ROM zip file on your MicroSD card, and swipe to flash.
Replies 8. Views 12K. O. Feb 3, 2023. Octopu25. H. Huawei P9 & P9 Plus Firmware Updater 2.0 beta [Back to Stock, Unbrick & Update] XDA Forums
: Head to Settings > About Phone to confirm your new Android version, baseband, and kernel status.