Hard Reset LG P760 Optimus L9 - hardware buttons method

How to do the factory reset by using the hardware buttons. The hard reset operation will restore your LG P760 Optimus L9 to the factory state. All settings, applications and data added by the user will be removed. The process is simple, useful and it can solve a lot of phone's problem. More info: http://www.hardreset.info/devices/lg/lg-p760-optimus-l9/