LG KT610 Symbian hard reset
Enter 3845#*610# reset code then choose 4. Factory reset.
orMenu > Settings > (Security) Factory settings
To restore the default settings of your device or remove any operator settings, press the left soft key [Yes] and key in the lock code.
► Default lock code is 12345.
You can use LG Mobile Support tool to repair some LG cell phone model, after download select menu Customer Support > Recovery Phone