Ok so I've fallen under temptation and now wish to get the Iphone. I have T-mobile and I am under contract until 2012. T-mobile told me they can help me configure an UNlocked iphone so that i'd be able to get tmobile service. I would only have to pay for internet access on a monthly charge of $30 a month.

Has anyone configured the iphone for tmobile before? Are there any limitations or disadvantages that comes along reconfiguring this phone? Please let me know.