Performing soft reset and hard reset ( master reset ) ZTE Grand X via Settings menu:
- select Apps from home screen
- select Settings
- select Backup and Reset
- select Factory data reset.
To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.
Warning! All data will be erased from device memory, including system and application data, settings and downloaded applications. Back up your important data. The device will restore to factory settings.
Performing Soft Reset
If your phone hangs or does not responding, try to Press and hold power key about 10 seconds. It will rebooting automatically. Or try to remove and re insert the battery and SIM Card ( If available ).