Now, T-Mobile has decided that it will move its UNcarrier 5.0 announcement to Seattle as well. T-Mobile's official statement on why the move is being made is:
Whether or not that is completely true, we can't say. There is a small chance that the two events are connected, given that it is assumed Amazon will be announcing a smartphone. But, it is more likely that T-Mobile didn't expect that it could compete for media attention when pitted against Amazon's first smartphone announcement, and so decided to move the event in order to make it easier.
If it is the latter reasoning, it has worked well, because we will be there to bring you the T-Mobile announcement information as it happens.