Samsung SGH X820 Manual

Also see for SGH X820: Service manual

95Solve problems“Enter PUK”• The PIN has been entered incorrectly three times,and the SIM card is now blocked. Enter the PUKsupplied by your service provider.“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.Your correspondent cannot reach you• Be sure that your phone is switched on. ([ ]pressed for more than one second.)• Be sure that you are accessing the correct cellularnetwork.• Be sure that you have not set an incoming callbarring option.Your correspondent cannot hear you speaking• Be sure that you have switched on themicrophone.• Be sure that you are holding the phone closeenough to your mouth. The microphone is locatedat the bottom of the phone.The phone starts beeping and “Warning. Lowbattery” flashes on the display• Your battery is insufficiently charged. Recharge thebattery.The audio quality of the call is poor• Check the signal strength indicator on the display( ). The number of bars indicates the signalstrength from strong ( ) to weak ( ).• Try moving the phone slightly or moving closer to awindow if you are in a building.