I don't see how them having controlling stake in TMobile helps them on that goal. I don't see either how wireless carriers have a real way to limit Googls mobile ad. I think Android alone accomplishes that goal, and until and unless phone carriers role out their own os alternatives that people don't hate, they'll be forced to offer Android.

Their involvement with spectrum bidding got them open access rights for only a few million.

Maybe I'm missing something obvious here though..