Tethering is blocked on the T-mobile Galaxy S6 if you are on an unlimited data plan. I would never encourage anyone to use phone tethering as a one and all solution for your home internet, however many of you would argue that you have paid good money for your mobile data and should be able to use it on whichever device you want. "Fenny" has released his method for enabling free native wifi tether on the T-mobile variant of the Galaxy S6! This method is semi complicated and does require that you are familiar with running various adb commands. Head to the link below for the full guide.
via XDA