: Essential for your computer to communicate with the phone while it's powered off.
Disconnect battery, wait 30 seconds, reconnect, and try again with a USB 2.0 hub (not USB 3.0).
Clears out deep, system-level viruses that a normal factory reset cannot touch. Unbricks Devices:
: Appropriate Unisoc/SPD or MediaTek drivers (depending on the specific regional hardware variant) so your computer can recognize the phone. Flashing Utility : Software such as SP Flash Tool SPD Upgrade Tool