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Huawei Mate 20 Pro
Installation instructions and tests
(Software test points using DC-Phoneix and HCU clients etc...) If you managed to get an unlock code back in 2019, that's worth a try too. If you downgrade a device from EMUI 11 or above, you will need a harmony tp cable to reenable USB 2.0 transfer. Regular USB 3.0 cable might be OK (not tested).
If downgrading from EMUI 11, Huawei SCP fast charging cannot be activated.
adb reboot bootloader
fastboot flash system Havoc-OS-v3.12-20201230-Official-arm64-ab.img
Don't forget to do a factory reset in the stock recovery.
| Component | Comment |
|---|---|
| Camera | Works |
| Speaker / Mic / Calls | Works |
| Bluetooth | Works |
| WiFi | Works |
| SIM / Mobile Data / Voice | Works with China Mobile sim card, others may need to set the access point correctly |
| VoLTE | Not tested |
| Fingerprint | No, doesn't recognize the ud fingerprint sensor, see Issue #468 |
| NFC | Not tested |
| USB transfer | Same as when running EMUI 9 (*) |
| ADB | Works, but needs to manually set the authorization file (**) |
*If you downgrade to EMUI 9 and can use usb transfer before flashing the system image, you can still use it after flashing. If you can't before, you can't later。
**Copy the /data/misc/adb/ folder from another Android device that is authorized for debugging to this Android device that needs to be debugged, and then reboot.(recommended) or setprop ro.adb.secure 0 (not recommended as it allows debugging from any computer and is not safe).
@Cyanide-zh - EMUI 9.1.139 base [Havoc-OS-v3.12-20201230-Official-arm64-ab.img.xz] - Tested 2022.01.20
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