Performing a hard reset of the Mytouch 4g will remove ALL data including the Google account, system data, application data, application settings, and downloaded applications. Typically this will not erase the contents on the SD card, but a final backup is always recommended. Only perform this reset if absolutely necessary.
- From the home screen, go to MENU, and then press Settings.
- Hit SD & phone storage
- Factory data reset
- Tap Reset phone
- Hit Erase everything.
Alternate method (if the phone can't be turned on)
- With the phone turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button.
- Wait for the screen with the three Android images to appear, and then release the VOLUME DOWN button.
- Press VOLUME DOWN to select FACTORY RESET, and then press the POWER button