Samsung I6210 User Manual page 64

Your phone displays "No service" or "Service
unavailable."
• 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 dialed.
• 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.
Another caller cannot reach you.
• Ensure that your phone is turned on.
• Ensure that you have accessed the right cellular
network.
b
• 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.
].
The phone beeps and the battery icon flashes.
Your battery is low. Recharge or replace the battery to
continue using the phone.
The audio quality of the call is poor.
• Ensure that you are not blocking the phone's
internal antenna.
• When you are in areas with weak signals or poor
reception, you may lose reception. Move to
another area and try again.