Grrrrr now I am blocked out from the 2x booster with my other account again (that one that has been working for a month or two)...

Are you guys shifting devices a lot? This morning I made a bit unusual shift since I had problems watching videos with one iPad, and after the now problematic account had gone from the phone to the pad I couldn't use the 2x booster. I don't know if I could have used it or not directly on the phone...