This phone is faulty , the problem is .
It will not dial out or text .
It shows full signal and the 3g and blackberry logo show in the corner.
All other features on the phone work.
It has not been dropped or got wet. .
This my be a simple fix for someone .

how much would it cost to get this problem sorted out?

ALSO blackberry curve 8900

The phone freezes every now and then and the buttons wont work when this happens.

How much would it cost?