138 139Solving ProblemsBefore contacting the after-sales service,perform the following simple checks. They maysave you the time and expense of anunnecessary service call.When you switch your phone on, thefollowing messages may appearInsert SIM Card• Check that the SIM card is correctly installed.Phone Locked Enter Password• The automatic locking function has beenenabled. You must enter the phone’s passwordbefore you can use the phone.Enter PIN• You are using your phone for the first time.You must enter the Personal IdentificationNumber supplied with the SIM card.• The PIN Check feature is enabled. Every timethe phone is switched on, the PIN has to beentered. To disable this feature, use the PINCheck menu (Menu 6.6.1).Enter PUK• The PIN code was entered incorrectly threetimes in succession and the phone is nowblocked. Enter the PUK supplied by yournetwork operator.Solving Problems“No service,” “Network failure” or“Not done” is displayed• The network connection was lost. You may bein a weak signal area (in a tunnel orsurrounded by buildings). Move and try again.• You are trying to access an option for whichyou have not taken out a subscription withyour service provider. Contact the serviceprovider for further details.You have entered a number but it wasnot dialed• Have you pressed the key?• Are you accessing the right cellular network?• You may have set an outgoing call barringoption.Your correspondent cannot reach you• Is your phone switched on (the keypressed for more than one second)?• Are you accessing the right cellular network?• You may have set an incoming call barringoption.Your correspondent cannot hear youspeaking• Have you switched off the microphone?• Are you holding the phone close enough toyour mouth? The microphone is located at thebottom of the phone.