Samsung SGH-X640 User Manual page 76

"Enter PUK"
• The PIN code has been entered incorrectly three
times in succession, and the phone is now blocked.
Enter the PUK supplied by your service provider.
"No service," "Network failure," or "Not done"
displays
• The network connection has been lost. You may be
in a weak signal area. Move and try again.
• You are trying to access an option for which you
have 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 you have accessed the right cellular
network.
• Be sure that you have not set an outgoing call
barring option.
Your correspondent cannot reach you
•
•
•
Your correspondent cannot hear you speaking
•
•
The phone starts beeping and "Battery low"
].
flashes on the display
•
The audio quality of the call is poor
•
Be sure your phone is switched on. ([
for more than one second.)
Be sure you are accessing the correct cellular
network.
Be sure that you have not set an outgoing call
barring option.
Be sure you have switched off the microphone.
Be sure you are holding the phone close enough to
your mouth. The microphone is located at the
bottom of the phone.
Your battery is insufficiently charged. Recharge the
battery.
Check the signal strength indicator on the display
( ). The number of bars indicates the signal
strength from strong (
] pressed
) to weak ( ).
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