| Problem | Solution | |-------------------------------|--------------------------------------------------------------------------| | Stuck in eRecovery loop | Flash stock recovery via fastboot, then dload full ROM. | | Custom ROM bootloop | Wipe Dalvik/Cache, format data, reflash via TWRP. | | Missing IMEI after flash | Restore OEMinfo backup (requires TWRP backup taken before flashing). | | "Software install failed" | Use correct ROM for your exact model (LYA-L09 vs LYA-L29). |

#HuaweiMate20Pro #CustomROM #Android #TechRetro #LineageOS #Kirin980

Aftermarket firmware like LineageOS, which require a paid third-party bootloader unlock. 1. Official Stock ROM: Download & Installation

Disclaimer: Flashing a ROM voids warranty (where applicable) and risks permanent damage. The author is not responsible for bricked devices. Always use official tools and verified downloads.

Huawei Mate 20 Pro remains a highly regarded flagship, but its ROM landscape is complex due to locked bootloaders and software regionality. 1. Official OS Options EMUI 12 (Global): Most global versions are currently supported up to HarmonyOS (China): Chinese models ( ) have been updated to HarmonyOS 3.0 HarmonyOS 4