Running on Windows Mobile 6.1 Standard, Samsung Jack is both slim and lightweight. It comes with a full QWERTY keyboard (like all the BlackJack handsets) and advanced messaging capabilities, including: instant messaging, multiple email accounts, Microsoft Office Outlook Mobile, AT&T Xpress Mail or Microsoft Direct Push.

Another good news is that the smartphone is upgradeable to Windows Mobile 6.5. Samsung Jack’s full list of features and specs includes: QVGA display  3G connectivity  Wi-Fi  aGPS, AT&T Navigator  AT&T Mobile Music  Cellular Video  Stereo Bluetooth  256 MB RAM  3.2MP camera with video recording.

MicroSDHC card support, up to 16GB  AT&T will start selling the new Samsung Jack on May 19, for as low as $99.99 (2-yr contract agreement required). Until you get the chance to check out the handset for yourself, you can watch this video, showing it next to the old BlackJack I and II.