I have an iPad2 ATT 3G, which I purchased in the US. I am traveling in the UK and would like replace the SIM and use a UK 3G network. Question is: I have never activated the ATT network while in the States and now I seem to recall reading somewhere that I would have to have done that using iTunes while still in the US, before coming over and swapping SIMs. Am I remembering correctly?, because I bought a UK SIM today and swapped it out and while I'm getting a 3G signal (indicated in the upper left corner) everytime I try to actually use the net, I get a message saying " you are not currently signed up for a data plan, would you like to do so now?", then when I click "yes", I get a message saying "connection failed"
Now I'm wondering if I screwed up and should have activated the 3G before coming over, or maybe there's some other problem. Or maybe I can be on wifi while activating the 3G?
I'll be going back to the place I bought the SIM today to see if they can help but if there is anyone who's been down this road and can shed some light I'd be grateful.