153Solving problemsBefore calling for service, perform the followingsimple checks for the problems listed. You may savethe time and expense of an unnecessary servicecall.When you switch your phone on, one ofthe following messages appears:Insert SIMCheck that the SIM card is correctly installed.Phone locked: enter passwordThe Phone lock feature is enabled. You must enterthe phone’s password before you can use thephone.Enter PIN• You are using your phone for the first time. Youmust enter the Personal Identification Numbersupplied with the SIM card.• The PIN check feature is enabled. Every time thephone is switched on, you must enter the PIN. Todisable this feature, use the PIN check menuoption (Menu 4.4.1). See page 112.Enter PUKThe PIN was entered incorrectly three times insuccession and the phone is now blocked. Enter thePUK supplied by your network operator.
