I"ll be totally honest with you. You should just make the switch to AT&T. Of course it's just my opinion and you have the right to decide what ever makes you happy but I just switched from T-Mobile over to AT&T and very happy. I was with Tmobile for 2 years and while their customer service is the GREATEST their coverage cant compare to At&t. Plus Tmobile is sorry when it comes to getting new devices. AT&T gets all the new devices and their coverage in Cincinnati is excellent. I had no reception in my own house with Tmobile. If it wasnt for my WiFi at home I'd never be able to talk on my cell with tmobile. Also, if you going to invest in getting the greatest device ever created (iphone 3g) why not switch to AT&T and being able to use all the features the iphone has available with AT&T. Again, it's your decision but to me unlocking and jail breaking your phone just seems like too much work and stress. From warranties to software updates, their is just too much you would lose if had a jailbroke or unlocked iphone. I'm not knocking it at all, i thought about buying a unlocked 1st generation iphone last year and using it with TMobile but i didnt. Cell phone life would just seem so much easier with no restrictions of an unlocked phone.