LG Optimus L3 E400 hard reset If you have forgotten PIN or Password
All data will be lost! Remember to back up any important data before doing a hard reset.
When the LG L3 phone is turned off, press and hold the Home key + Volume down key + Power key for over 10 seconds. When the screen shows the LG logo, release the Power key.
After the screen shows the hard reset screen, release the other keys.
Leave your phone for at least a minute while it performs the hard reset, then your phone will be turned on.
To reset your LG Optimus L3 E400 hard reset phone to factory settings and erase all the data on your phone, touch Menu > Settings> Privacy > Factory data reset > Reset phone.
Resetting the phone does not erase any system software updates you have downloaded or any files on your microSD card,
such as music or photos. If you reset the phone in this way, you are prompted to re-enter the same information that you did when you first started Android.
You can use LG Mobile Support tool to repair your LG cell phone, after download select menu Customer Support > Recovery Phone