Sorry To Bother Everone Again

But I Have A 8310

When I Put My T - Mobile Sim Card It Works! I Can See The T-mobile Logo

But When I Call It Just Doesnt Work! It Bleeps 3 Times And Hangs Up.

I Tried Other Sim Cards And The Same Thing Happens.

If You Want The Ime:350883106191229

I Just Dont Understand Why Its Hanging Up When I Call + I Get Full Reception.

Plz Can Some One Help Me

Thanks Once Again

Ali