T-Mobile has begun hyping its next “Un-carrier” move, which it will announce at the Consumer Electronics Show in Las Vegas next month.

T-Mobile CEO John Legere tweeted out a teaser video for the announcement that features him being grilled by a barista, dentist, delivery person, skywriter and many others about what’s next for T-Mobile. He stayed mum in the video, though he may have slipped some information to the dentist.

“Everybody’s been asking for this one. You’re going to love what’s next,” Legere said in the video.

Spurred by the arrival of Legere as CEO in 2012, T-Mobile’s “Un-carrier” announcements over the past few years have helped the company add new customers and compete with bigger wireless carriers like AT&T and Verizon.

The company’s past Un-carrier moves have included introducing a single wireless data plan, unbundling the cost of the phone from the wireless plan, paying customers’ fees when they switch from another carrier, no-extra-charge roaming in Canada and Mexico, the ability to stream video and music without counting against data caps, the T-Mobile Tuesdays loyalty program, issuing company shares to subscribers, and other initiatives.

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