here's a fun thread - how can the iPhone 4 improve? I'm thinking of buying the iPhone 4 at full price, and using it on T-Mobile. I've been told this is definitely possible, and T-Mobile's prices are much lower than AT&T's - better yet, their month-to-month pricing is $20 cheaper than on-contract pricing, meaning that I'd save $500 in 2 years, almost justifying the $600 cost of the unsubsidized iPhone 4. Question is - would I still like the iPhone 4 in 2 years? how could you see it improving? FaceTime is here, and the processor is pretty fast. How can you see the phone progressing in 2-years' time? Also - if you've had any luck using iPhone on T-Mobile, please share your experience. Thanks!