81TroubleshootingImportant error messagesThese are some of the most important error messages which may be displayed:Failed Roaming in the selected area is not allowed.Roaming with the selected network is not allowed.The network has detected an authentication failure because your SIM is notregistered with that network – contact your service provider.SIM blocked The SIM is blocked because the PIN unblocking key (PUK) has been enteredincorrectly ten times – contact your service provider.Insert SIM The phone has detected a problem with the SIM – switch the phone off and thenback on; if the message is still displayed contact your service provider.Invalid SIM The SIM has failed one or more of the SIM personalisation checks – contactyour service provider.Function unavailable The selected feature is either not supported by the SIM or is not available withthe current subscription – contact your service provider.PIN2 invalidated The PIN2 is blocked permanently because the wrong PUK2 has been enteredten times, services controlled by PIN2 cannot be used – contact your serviceprovider.Message rejected.Storage fullorMessage rejected.SIM fullA message has been received but the message store is full – to receivemessages, delete some of the currently stored messages.Too many characters. The edited or newly created contact number is too long for the SIM.This message may not bestoredThe message area is full. Your messages cannot be stored until some of thecurrently stored messages are deleted.Verification failure On changing the PIN/PIN2, verification of the new code is incorrect – retrychanging the PIN/PIN2 with correct verification.Auto redial list full Redial list of unsuccessfully dialled numbers is full – switch the phone off andthen on again.