Samsung SM-G610M/DS User Manual page 37

The phone beeps and the battery icon flashes.
Your battery is low. Recharge or replace the battery to continue using the phone.
The audio quality of the call is poor.
 When you are in areas with weak signals or poor reception, you may lose
reception or experience poor audio quality. Move to another area and try
again.
 When you are in areas with weak signals or poor reception, you may lose
reception. Move to another area and try again.
You select a contact to call, but the call is not dialled.
 Ensure that the correct number is stored in the contact list.
 Re-enter and save the number, if necessary.
The battery does not charge properly or sometimes the phone turns itself off.
 The battery terminals may be dirty. Wipe both gold-coloured contacts with a
clean, soft cloth and try charging the battery again.
 If the battery will no longer charge completely, dispose of the old battery
properly and replace it with a new battery.
Your phone is hot to the touch.
When you use several applications at once, your phone requires more power and
may heat up.
This is normal and should not affect your phone's lifespan or performance.
Some of the contents in this manual may differ from your phone depending on
the software of the phone or your service provider.