Originally Posted by BallHawk3
Two things can be wrong.
Your SIM Card is bad. Does another t-mobile phone read your SIM? It can happen.
Or, the phone is bad, it can't read SIMs. Once again, try another t-mobile SIM in here. Goto a store and do this. That should tell you what's wrong, either phone or SIM.
Maybe a third reason:
Have you actually put the SIM card into the slot? Or, have you placed it properly?
So the problem is either the phone, or the SIM card, or You.
Either way, going to the store will help identify the problem.