If your device freezes or hangs, you may need to close programs or reset the device to regain functionality.
If this does not solve the problem, perform a factory data reset. In Idle mode, open the application list and select Settings → Privacy → Factory data reset → Reset phone→ Delete all.
To physically factory reset the phone:
- Remove the battery, and then replace the battery.
- While holding down the ‘down’ volume button press the power button, keep the volume button held until you see and android being unpacked out of a box.
- Press the home button when you the warning triangle
- Depending on your needs select the correct option using the volume buttons and the menu button to select.
Reminder: Please backup your contacts and SMS to your Memory card before resetting the phone. Factory data reset will erase all your personal information in the mobile phone.