I just wanted to share my experience with T-Mobile trade in as well as moving my two AT&T lines over to them. Given the "awesome" customer service that we get from these mobile companies, my experience with T-Mobile has been nothing but great so far and I feel like they deserve this mention. A little bit of background: I had called up AT&T asking for my ETF amount because I was considering moving to T-Mobile during the time of iPhone pre-orders. The retention rep offered me $300 credit to stay with AT&T and also said that he will allow me to upgrade both of lines using AT&T Next. I felt it was a pretty good deal so I agreed. Come day of iPhone pre-order, I was point blank denied of the promised deal. The same rep told me, unfortunately, the terms have changed (in a matter of two days) and he cannot offer me the said deal. In fact he said, he cannot offer me anything. He not only denied me the deal but also ruined my chances of getting an iPhone on launch day because he had made me wait until 10AM of that day to give a call back. Needless to say, there was no reason for me to continue with AT&T. So I placed a pre-order in T-Mobile store on Sep 12th. I also traded in two iPhones but I was allowed to keep both of them until I received my new phones. Luckily, I got both of my new iPhones on Sep 19th (despite placing the order in the evening on Sep 12th!). I sent both of my old phones the same day. Upon receiving my phones, T-Mobile actually credited me more than the quoted amount in store. Their network isn't as great as AT&T but their LTE is kickass! Beats my home internet connection. Even before coming to T-Mobile I knew that I would probably be losing out on the network quality but I had enough **** from AT&T and I was totally willing to make that sacrifice! Oh btw, just in case you ever want to cancel your account with AT&T, make sure that you do it either before your billing cycle ends or on the last day of billing cycle. AT&T will charge you FULL amount of your last billing cycle and will not prorate it based on your usage. For just 2 days of my usage, they charged me for the entire 30 days of the billing cycle. No amount of customer calls and chats helped me reserve those charges. Some people have had luck but it didn't work out at least in my case. So, **** you AT&T!