Samsung SGH-E780 User Manual

Also see for SGH-E780: User guide Service manual

90Solve problemsHelp and personal needsTo save the time and expense of an unnecessaryservice call, perform the simple checks in this sectionbefore contacting a service professional.When you switch on your phone, the followingmessages may appear:“Insert SIM”• Be sure that the SIM card is correctly installed.“Phone lock”• The automatic locking function has been enabled.You must enter the phone’s password before youcan use the phone.“Enter PIN”• You are using your phone for the first time. Youmust enter the PIN supplied with the SIM card.• The PIN check feature is enabled. Every time thephone is switched on, the PIN has to be entered.To disable this feature, use the PIN check menu.“Enter PUK”• The PIN code has been entered incorrectly threetimes in succession, and the SIM card is nowblocked. Enter the PUK supplied by your serviceprovider.“No Service,” “Network Failure,” or “Not Done”displays• The network connection has been lost. You may bein a weak signal area. Move and try again.• You are trying to access an option for which youhave no subscription with your service provider.Contact the service provider for further details.You have entered a number but it was not dialled• Be sure that you have pressed [ ].• Be sure that you have accessed the right cellularnetwork.• Be sure that you have not set an outgoing callbarring option.