btroubleshootingYour phone displays “Service unavailable” or“Network error.”• When you are in areas with weak signals or poorreception, you may lose reception. Move toanother area and try again.• You cannot access some options without asubscription. Contact your service provider formore details.You enter a number, but the call is not dialled.• Ensure that you have pressed the Dial key: [ ].• Ensure that you have accessed the right cellularnetwork.• Ensure that you have not set call barring for thephone number.Another caller cannot reach you.• Ensure that your phone is turned on.• Ensure that you have accessed the right cellularnetwork.• Ensure that you have not set call barring for thephone number.Another caller cannot hear you speaking.• Ensure that you are not covering the built-inmicrophone.• Ensure that the microphone is close to yourmouth.• If using a headset, ensure that it is properlyconnected.PUK codeYour SIM card is blocked, usually asa result of entering your PINincorrectly several times. You mustenter the PUK supplied by yourservice provider.Message Try this to solve the problem: