I've decided I would like this phone but of course being a UK release I am unsure about a few things. I know all of them are quad band phones so I will have not problem with GSM now what kind of HSPA signals they can use is in question for me. Some of the ebay sellers list it as compatable with all bands, some list them as compatable with UK only bands. I know ebay sellers often ether don't know what the hell there talkin about or just like to lie in order to help trick people into buying stuff. So my questions are is there more than one version of the GSM version of this phone? If not will it be compatable with US 3g/4g? (I use att but switching to t-moble would not be out of the question) If there is more than one version how would I know witch one to buy in order to get what I want?