After I sell my 8GB iPod touch, I'm planning on buying a 16GB iPhone from Best Buy or something. I will then unlock it, by an AT&T GoPhone and switch the SIM cards. I'm going to be buying minute cards as well as unlimited data transfer cards ($20 for 30 days each) for internet. Now my big question is...will it work?? And if it will, will the internet I get from the GoPhone SIM card be the same as just using 3G on a normal AT&T plan? Thanks.