ZTE Grand S3 hard reset
You can reset your ZTE device's password after power on: input *983*987# in emergency dial-up pad. Select Erase everything. It will restore factory settings and your personal data will be erased.Turn off your ZTE Grand S3. Press Volume UP + POWER ON.
In the recovery menu select wipe data / factory reset with Volume down button. Press power to confirm.
Select highlight Yes -- erase delete all data press power to confirm.
After hard reset completed, select reboot system now!
All data will be deleted!
ZTE Grand S3 hard reset from menuOr if your ZTE Grand S3 phone is responding to screen input, then open Settings from the Applications menu. Tap Backup & reset > Factory data reset, click Reset phone and then Erase everything to format your phone.
To reset the ZTE Grand S3 device from time to time for optimum performance, power off the device and remove the battery. Reinsert it and turn on your Andorid phone.