The device pictured below is the Pantech P9050 handset, recently spotted in the FCC database and supposedly coming to AT&T. This handset is a GSM/WCDMA unit with a pretty big display and a nifty QWERTY keyboard, a full horizontal sliding one.
Here’s the specs list for the phone:
Display: 3.1 inch, 480 x 800 pixels
Connectivity: dual band GSM/WCDMA, Bluetooth, GPS
No info on the OS, but the lack of Android keys points towards Pantech’s proprietary platform.