A master reset will result in the loss of all data stored on the device including 3rd party applications.
This type of reset should only be used as a last resort after all other troubleshooting steps have been exhausted. It is highly recommended that you complete a backup of the device information before proceeding with the steps in this tutorial.
From the home screen, tap the Menu key.
Scroll to and tap Backup and reset.
Tap Factory data reset.
Read the warning and tap Reset device.
Tap Delete all.
The device will completely reset and restart.
The device is now reset.