LG D520 - Manual (Page 11)

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5. Using Hard Reset (Factory Reset)
If your phone needs to be restored to its original condition, use a Hard Reset to
initialize your phone.
Warning! If you perform a Hard Reset, all user applications and user data will be
deleted. Please remember to back up any important data before performing a
Hard Reset.
1 Turn the phone off.
2 Press and hold the Power/Lock Key + Volume Down Key at the same
time.
3 Release the keys when the FACTORY HARD RESET screen appears.
4 Press the Power/Lock Key to continue or press any other key to cancel.
5 Press the Power/Lock Key again to confirm. Your phone will be restored
to its factory settings. To cancel, press any other key.
6. Using Safe Mode
To recover your phone when malfunctioning.
1 Turn off your phone and reboot. When you see the T-Mobile animation
press and hold the Volume Down Key until the phone reboots. Your main
screen will then be displayed with the words “Safe mode” in the lower left
corner.
2 From the Home screen, tap the Menu Key and tap System settings >
Apps.
3 Tap one of the available tabs at the top of the screen and select the application
you wish to uninstall.
4 Tap Uninstall and OK to confirm.
5 After uninstalling the application, reboot your phone.