Today T-Mobile and Samsung announced the addition of two new handsets in T-Mobile’s line up. The Samsung Comeback and Gravity share a number of features. They both have quad-band GSM/EDGE 1700MHz UMTS/HSDPA 3G, GPS, stereo Bluetooth, 2 megapixel camera with video capture and support for microSD cards up to 16GB. Both have dedicated messaging keys.

• Comeback: This messaging phone has two displays, numeric keypad, and a sideways flip that reveals a full QWERTY keyboard. It will be available in T-Mobile stores starting July 22 for $130 after rebate with a two-year service agreement.
• Gravity 2: This messaging phone has a numeric keypad on the front and is a sideways slider that also has a full QWERTY keyboard. The Gravity 2 should be available some time in August. Pricing has yet to be determined.