Samsung GT S5600 User Manual page 64

Your phone displays "Service unavailable" or
"Network error."
• When you are in areas with weak signals or poor
reception, you may lose reception. Move to
another area and try again.
• You cannot access some options without a
subscription. Contact your service provider for
more details.
You enter a number, but the call is not dialled.
• Ensure that you have pressed the Dial key: [
• Ensure that you have accessed the right cellular
network.
• Ensure that you have not set call barring for the
phone number.
b
Another caller cannot reach you.
• Ensure that your phone is turned on.
• Ensure that you have accessed the right cellular
network.
• Ensure that you have not set call barring for the
phone number.
Another caller cannot hear you speaking.
• Ensure that you are not covering the built-in
microphone.
].
• Ensure that the microphone is close to your
mouth.
• If using a headset, ensure that it is properly
connected.