Alldocube Iplay 20 Custom Rom [best]

This is the most critical and difficult step. It usually requires enabling "OEM Unlocking" in Developer Options and using specialized Unisoc bootloader unlock tools on a PC.

Boot back to TWRP, wipe cache/dalvik, and format data again. If that fails, restore your TWRP backup. alldocube iplay 20 custom rom