wifi tethering on the gflex d950? getting foxfi to work, hide tethering??

hey guys so i have an unlocked d950 g flex and im currently using it on metropcs/ t-mobile so after trying my hardest and alot of research the only tethering app i was able to get to work is "wifi tether router". It works fine but from what i was told w.t.r. blocks your tethering but apparently it doesnt because im still gettting throttled . In my past ive always used foxfi to hide tethering but i cant get it to work with these phone. Does anyone know of any other ways to hide tethering usage for the g flex, another app that should work, or how to correct foxfi for the g flex?