If you have installed Magisk or TWRP and want to revert to factory condition (for warranty or resale), the stock ROM erases all modifications.
– ensure your firmware file name explicitly includes "NX627J." Official ZTE Nubia Z20 NX627J Stock Rom
There are several scenarios where downloading and flashing the becomes necessary: If you have installed Magisk or TWRP and
If your phone still boots: