My blackberry curve won't allow me to send any text messages at all. I RECEIVE them, but every time I reply, it does not come through. And on the top left corner it says -Unassigned number. This has been going on for two days now. I was wondering if there's something wrong with my phone or something. If any of you know how to help me fix it, then please do.

If you're willing to help; please do it step by step.


Thanks in advance.