After months and months of waiting, Microsoft’s highly anticipated re-entry into the jam-packed smartphone market is almost upon us. Tomorrow, Microsoft will finally release all the final details about their new mobile OS: including launch carriers (AT&T is a given considering how they are co-hosting the press conference tomorrow as you can see in the invite above, and T-Mobile is said to be making their own announcements later in the day), phones (which if early leaks are correct, will be absolutely awesome), and even more about the experience of the OS like apps and services such as Zune and Xbox Live.

The event kicks off at 9:30 am tomorrow, so make sure to check back all day for the full teen rundown.