I am in the US and recently tried to switch my ATT Iphone over to TMobile US, only to be faced with limited functionality of webbrowsing due to lack of correct 3G signal frequency for the US model Iphone. I gave up this idea and am staying with ATT. Now a friend in Austria is asking me if I would recommend that she buys the Iphone there. She's with TMobile Austria which sells the Iphone along with other Android phones. Now the question is: How is the Austrian version of the Iphone different from the US edition? Obviously TMobile frequency must be in tune with the Iphone there, while it is not here in the USA. Is the TMobile Austria operating on a different frequency than the US TM? I doubt that TM Austria would offer an Iphone with limited webbrowsing.