atroubleshootingtroubleshootingIf you are having trouble with your mobile phone, try these troubleshooting procedures before contacting a serviceprofessional.While using your phone, the following messagesmay appear:Your 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.Message Try this to solve the problem:Please insertSIM cardEnsure that the SIM or USIM cardis installed correctly.Phone lockWhen the phone lock feature isenabled, you must enter thepassword you set for the phone.PIN lockWhen using the phone for the firsttime or when the PIN requirementis enabled, you must enter thePIN supplied with the SIM or USIMcard. You can disable this featureby using the PIN lock menu.PUK lockYour SIM or USIM card isblocked, usually as a result ofentering your PIN incorrectlyseveral times. You must enter thePUK supplied by your serviceprovider.Message Try this to solve the problem:
