Hey Guys,
I have a 3GS iphone running on XT. everything is working fine... EXCEPT I can't use get the data to work.... I have got a new SIM card, entered all the telecom carrier setting etc....
But I still get the "Could not activate cellular data" popping up every time I try and access anything.
Anyone got a any fixes? or anything I could try? it would be greatly appreciated! 
Thanks

David