New Pda Giant Pantech Duo C810 Gsm Unlocked Cell Phone Dual-Slider 3g Support 1.3-Megapixel Camera The Pantech Duo has a unique dual-slider design with a slide-out number dialpad plus a QWERTY keyboard. It comes with the Windows Mobile 6 OS as well as a 1.3-megapixel camera, quad-band support, HSDPA, plus access to AT&T's broadband services.