atroubleshootingIf you are having trouble with your mobile phone, try these troubleshooting procedures before contacting a serviceprofessional.While using your phone, the following messagesmay appear:Message Try this to solve the problem:Insert SIMcardEnsure that the SIM card is installedcorrectly.Phone lockWhen the phone lock feature isenabled, you must enter the passwordyou set for the phone.PIN lockWhen using the phone for the first timeor when the PIN requirement isenabled, you must enter the PINsupplied with the SIM card. You candisable this feature by using the PINlock menu.PUK lockYour SIM card is blocked, usually as aresult of entering your PIN incorrectlyseveral times. You must enter the PUKsupplied by your service provider.Message Try this to solve the problem: