LG Optimus F3 Start Manual page 12

Warning!
If the touch screen does not function while the phone is in the
process of charging, it may be due to an unstable power supply.
As a result, disconnect the USB cable from the device or unplug
the USB Adapter from the power outlet.
Connect the USB Adapter and USB cable (as shown on
1
the previous page).
Plug the USB cable (as shown on the next image) into the
2
phone's Charger/Accessory Port.
NOTE
The battery must be fully charged initially to improve battery
lifetime.
NOTE
Your phone has an internal antenna (as shown on the next
page). Be careful not to scratch or damage this rear area, as that
will cause loss of performance.
When charging your phone with a fully discharged battery, the
keypad LED will briefly flash indicating charging is occurring
in a mode designed to prevent battery damage. The blinking
will stop and normal charging will commence once a sufficient
minimum charge has been established.
10