T-Mobile is going to do another crazy thing for 'Un-carrier 8.0'

What will it be this time?

"This one is so big we had to keep it a surprise," reads an email announcement for T-Mobile's upcoming "Un-carrier 8.0" event.

The carrier has made it its job to shake up the mobile industry with moves like unlimited music streaming and free international data and texting, and now it's going to announce another crazy ploy tomorrow, December 16.

With Hanukkah beginning December 17, maybe the un-carrier is looking to kick off the holidays right.

In reality we have no idea what they're going to announce, but with T-Mobile CEO John Legere on stage fielding questions through Twitter (use the hashtag "#Uncarrier8") it's guaranteed to be entertaining at the very least.