LG E440 Quick Reference Manual page 290

Getting to know your phone
Phone overview
Earpiece
Proximity Sensor
Home Key
Return to the Home screen from
any screen.
Back Key
Return to the previous screen.
2
Power/Lock Key
Switch your phone on/off by
•
pressing and holding this key.
Short press to lock/unlock the
•
screen.
Menu Key
Display the available options.