ZTE Grand S II 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 S II. Press Volume UP + POWER ON.
All data will be deleted!
ZTE Grand S II hard reset from menuOr if your ZTE Grand S2 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 S II device from time to time for optimum performance, power off the device and remove the battery. Reinsert it and turn on your Andorid phone.