Hard Reset for LG Optimus T
A hard reset, also known as a factory reset or master reset, is the restoration of a device to the state it was in when it left the factory.
All settings, applications and data added by the user are removed.
The term is often heard in reference to smartphones and tablets but laptop and desktop computers, as well as most other electronic devices, can usually be restored to factory conditions.
1. First of all make sure your phone is switched off.
2. Once its turned off press and hold power button with volume down at the same time.
3. Now when you will se LG logo you can release the buttons.
4. Wait few seconds and there should be Recovery mode menu on the screen.
5. Using your volume buttons to navigate and power button to select, go down to wipe data/factory reset option and press power button on it.
6. That's it! your phone will restart now and will be ready to work after that.