I am on AT&T right now and will be switching to T-Mobile in January. Because of that, I would like to buy the iPhone 6 unlocked. Of course we have no idea what the release of the iPhone 6 will be like right now. So in regards to the iPhone 5s, does anyone remember if Apple sold it unlocked on day 1? If not, does anyone remember how long it took for them to start selling them unlocked?