101Solve problemsHelp and personal needsTo save the time and expense of anunnecessary service call, perform the simplechecks in this section before contacting aservice professional.When you switch on your phone, thefollowing messages may appear:“Insert SIM card”• Be sure that the SIM card is correctlyinstalled.“Enter password”• The automatic locking function has beenenabled. You must enter the phone’spassword before you can use the phone.“PIN lock”• You are using your phone for the first time.You must enter the PIN supplied with theSIM card.• The PIN locking feature is enabled. Everytime the phone is switched on, the PIN hasto be entered. To disable this feature, usethe PIN check menu.“PUK lock”• The PIN code was entered incorrectly threetimes, and the SIM card is now blocked.Enter the PUK supplied by your serviceprovider.“No service” or “Service unavailable”displays• The network connection has been lost. Youmay be in a weak signal area. Move and tryagain.