T-Mobile TMHI Gateway + my old router

wish I knew more about those issues and could give some positive suggestion, but I don't.  You are right that "There's nothing to change in the TMO gateway"; it is a rather dumb device, deliberately made so by Tmo and their software implementation.  Unfortunately, they and perhaps the rest of the Telcos have taken the 'concept of a plan' approach, and seem to think that people are not very bright so t-mo is better off if we have no choices to make.  Mores the pity. 

think the app and their approach to with-hold the ability to make any adjustments to suit our patricular needs is a bit cynical and over-bearing.  What I have not tried is connecting my router to the G4AR in order to have a few options.   As I understand it that can create some issues, but I may end up ditching Tmo and going back to my previous ISP.  It's too bad they do not feel it is in their interest to be more transparent and to design their system to give us options.