Where is the iPhone T-Mobile ?

Ok, so I have T-Mobile for my service and I really love it. But I would love it more if they had the iPhone 5 right now. I am able to get it but it is taking forever to come out. My plan is great and I like the service that is given, all I want is for the iPhone 5 to come out. Some say that it is coming out on Christmas day but some say that it is coming out in January. I guess it is all in being patient because I do want to make sure that everything is done correctly so that nothing goes wrong with the phone when it does come out.