I just dumped Verizon on both my wife's and my Note 2 today.
T-Mobile is paying the contracts off.
In any case, when I called the guy and asked if there would be any problem with trading in two rooted phones he couldn't have cared less.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?