Another caller cannot reach you. Ensure that your phone is turned on. Ensure that you have accessed the right cellular network. Ensure that you have not set call barring for the phone number.Another caller cannot hear you speaking. Ensure that you are not covering the built-in microphone. Ensure that the microphone is close to your mouth. If using a headset, ensure that it is properly connected.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 losereception or experience poor audio quality. Move to another area and tryagain. When you are in areas with weak signals or poor reception, you may losereception. 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 aclean, soft cloth and try charging the battery again. If the battery will no longer charge completely, dispose of the old batteryproperly 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 andmay heat up.This is normal and should not affect your phone’s lifespan or performance.