Samsung GT-I8330 User Manual page 29

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Enter PIN
Enter PUK
Your phone displays "Network 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.
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.
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.
You select a contact to call, but the call is not dialled.
Ensure that the correct number is stored in the contact list.
Re-enter and save the number, if necessary.
When using the phone for the first time
or when the PIN requirement is enabled,
you must enter the PIN supplied with the
SIM card. You can disable this feature
by using the PIN lock menu.
Your SIM card is blocked, usually as a
result of entering your PIN incorrectly
several times. You must enter the PUK
supplied by your service provider.
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