Enable USB Debugging and OEM Unlocking in Developer Options.

The original hardware version. Most "Stock ROMs" found online are for this revision.

Before downloading any files, you must identify your device's revision, which is often found under the battery or in the system settings.

A common "NVRAM WARNING: Err = 0x10" can be fixed with specific patches for the T591 and T592 revisions. Leagoo KIICAA Power - Прошивки - 4PDA

Includes ports from HiOS (Tecno) and various lite Android 7.1.1 builds. Rooting and Maintenance

The Leagoo KIICAA Power has a surprisingly active community of ported ROMs:

This is the most reliable method for Leagoo devices. Load the MT6580 Scatter file from your stock firmware.

Installing Team Win Recovery Project (TWRP) is the gateway to custom ROMs and rooting.

Select only the recovery.img (TWRP) file and click . Connect the powered-off phone to the PC.

Deodexed and debloated versions are available for both revisions to improve performance on the limited 2GB RAM. Custom Recovery: TWRP Installation