Okay, so i have a Samsung behold for T-mobile.
And at the top of the screen it usually "T-Mobile" when it has service.
My phone is not shut off, and i have all five signal bars,
But where it usually says "T-Mobile" it says "Searching..."
And i cant receive messages, or calls
And i cant send messages or call anyone either.

Or connect to the internet.
Does anyone know whats wrong?