Panic set in.
Tap Erase Everything to confirm.
When basic troubleshooting fails, a (often called a Factory Reset or Master Reset) is the ultimate solution. This process wipes all data from your device and restores it to the exact state it was in when you first unboxed it. How to Hard Reset DOOGEE U10
The DOOGEE U10 will reboot. The first boot after a hard reset takes longer than usual (up to 5 minutes). Do not press any buttons during this time. Panic set in
A: No. The factory reset only wipes the internal storage. Your microSD card (if installed) remains untouched. However, it is always safe to eject it before resetting. How to Hard Reset DOOGEE U10