I have a basic Samsung phone and I have been using it for about two months when all of the sudden yesterday it started not receiving calls. I can make outgoing calls as well as send/receive texts but anytime someone tries to call me it says "your call cannot be completed as dialed, please hang up and try your call again". I have already dialed *228 several times to activate the phone again and it always says it is complete. I'm not sure how I can fix this?