I just got a Pixi 7 from T-mobile on thursday, and there is a app on the Play Store called Kingo ROOT that I used to root my Pixi. So I used AGK Fire, and loaded it onto my Fire Stick, and ran it. I also had to put SuperUser on the Fire Stick. Now I have root, and disabled the Blacklist, and ota updates.
If this is known, and a guarded secret, please let me know
I was surprised that it worked