Message Try this to solve the problem:
Your SIM card is blocked, usually as a Enter PUK result of entering your PIN incorrectly
several times. You must enter the PUK supplied by your service provider.
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.
troubleshooting
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