The Fujitsu Toshiba IS12T is the first device officially announced with Windows Phone 7.5 Mango. It officially features a 3.7" display, 13.2 MP camera with LED flash and is powered by a 1GHz processor.The device is also dust proof and water proof, so even with it's plastic feeling exterior, you know you have a solid device in your hand.
Check out the following hands on video of the device courtesy of PhoneArena:
You can read the full review of the Fujitsu Toshiba IS12T here.