For any Sony fans who are on T-Mobile or thinking about switching to T-Mobile, they new Sony Xperia Z flagship phone is now officially coming to the Uncarrier. They even have a sign-up page for future info available. Here's a refresh of specs for you,
  • 5-inch 1080p display
  • Qualcomm Snapdragon S4 Pro quad-core 1.5GHz processor
  • 2GB of RAM
  • 16GB of internal storage
  • 13.1 megapixel HD camera
  • 2.2 megapixel front camera
  • Android 4.1.2
  • IP57 Water and Dust resistant

Here's the T-Mo link: https://explore.t-mobile.com/sony-xperia-z