F840- User Guide

49
Troubleshooting
Your correspondent can not hear you
● Increase handset volume.
● Check handset cable is securely connected to the phone.
Battery duration in standby mode is too short
● Battery standby duration is related to network configuration. You may be in a
weak signal area. If the phone can not receive signals, it will keep sending a signal
to search network and consume additional power, which shortens the battery
duration.
Battery needs to be changed
● If battery cannot charge properly.
● Make sure power cable is correctly inserted to the device.
● Clean charging connectors in the phone and battery with a clean, dry cloth.
● Replace the battery or charger if it seems to be damaged.