Solving Problems137Solving ProblemsBefore contacting the after-sales service, perform thefollowing simple checks. They may save you the time andexpense of an unnecessary service call.When you switch your phone on, the following messages mayappear:Insert SIM Card● Check that the SIM card is correctly installed.Phone Locked Enter Password● The automatic locking function has been enabled. Youmust enter the phone’s password before you can usethe phone.Enter PIN● You are using your phone for the first time. You mustenter the Personal Identification Number (PIN)supplied with the SIM card.● The PIN Check feature is enabled. Every time thephone is switched on, the PIN has to be entered. Todisable this feature, use the PIN Check menu option(Menu 6.6.1).Enter PUK● The PIN code was entered incorrectly three times insuccession and the phone is now blocked. Enter thePUK supplied by your network operator.