I Cannot Make Or Receive Calls - Blackberry Curve 8350i Getting Started Manual

I cannot make or receive calls

Try performing the following actions:
• Verify that your BlackBerry® device is connected to the wireless network.
• If you have traveled to another country and you have not changed your smart-
dialing options, dial the full phone number, including the country code and area
code, for your contact.
• If you are not receiving calls, verify that call forwarding is turned off.
• Your SIM card might support more than one phone number, even if you only have
one phone number. Verify that your phone number is set as your active phone
number.
38