sold the iphone 3g i had a while back and tried out a few of the andriod phones. lets just say i am back to the iphone. even on the Edge networ, the iphone still is better. so i am trying to catch up with all of the new developments and such and have a few questions after shoping on craigslist for a 3g (not GS)... 3.1.3 cant be unlocked to tmobile right? whats the deal with the MC serial numbers? will they be able to be unlocked? i know there is some sort of "Spirit" release, but thats just for Jailbreaking untethered right? what is the last firmware that can be unlocked, 3.1.2 or a 3.1.3 that has the 5.11.07 baseband preserved? sorry for the questions, but with so many different Snow's and Rain's and basebands and stuff, its hard to keep it all straight. thanks!