Original post by: Fabio StartFix ,
The hard reset steps are : 1.Turn off the phone 2. Press and hold Volume Down Key + Power/Lock Key at the same time. 3. Release the keys when the FACTORY HARD RESET screen appears. 4. Read the warning and press the Power/ Lock Key to confirm. Press any other key to cancel. 5. Press the Power/Lock Key to confirm once more or press any other key to cancel. 6. Your device will perform a hard reset. If not working maybe the recovery is broken. You can use LG Mobile Support tool to repair your LG cell phone, after download select menu Customer Support > Recovery Phone LG LS970 Optimus G Safe Mode and System Recovery Using Safe mode To recover your LG LS970 phone when malfunctioning. 1. Turn off your phone and reboot. When you see the booting animation (Rethink Possible SM) press and hold the Volume Down Key . Your Home screen will then be displayed with the words "Safe mode" in lower left corner. 2. From the Home screen, tap the Menu Key and tap All settings > General tab > Applications. 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, turn off and reboot your phone. Rember that this steps will delete your data!! Tell me if working!!