Following T-Mobile CEO John Legere's tease of his company's upcoming "Uncarrier 4" effort, the big magenta operator has officially sent out invitations for the announcement of its plans. T-Mobile will hold an event on Wednesday, Jan. 8, which just so happens to be during CES in Las Vegas. The invitation received by AllThingsD includes the line "This one you aren't going to believe." 

We still don't know exactly what the fourth phase of T-Mobile's Uncarrier transition is going to consist of. One thing that we do know now, though, is that we're less than three weeks away from finding out. Considering that previous Uncarrier announcements have brought things like T-Mobile's Simple Choice plans, its JUMP upgrade program and free global data, it'll definitely be interesting to see what Legere and Co. have got up their sleeves next. Stay tuned.

Via AllThingsD