It will remove all the data ,contacts and apps that you installed
Power off mobile.
Press and hold volume down button and power button together until the LG logo appears on the screen.
When the LG logo is displayed, let go of the power button, keep pressing the volume down key and then press once more the power button.
Once you do that, on your LG G2 the factory reset menu will be displayed.
Press power button in order to agree and wait while the hard reset is being completed.
LG G2 Restore Factory Hard Reset Format Phone.So lets start the LG G2 Restore Factory, LG G2 Hard Reset.Turn Off the mobile phone for few mints.LG G2 Remove Pattern Lock.
Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.