You can buy the iPAQ 910 unlocked - for use with any GSM carrier (e.g. AT&T and T-Mobile in the U.S.) - directly from HP online or at retail through the likes of Amazon.com.

The iPAQ 910 is quad-band GSM/GPRS/EDGE phone with support for tri-band UMTS/HSDPA 3G, Bluetooth, Wi-Fi with support for VoIP, and Assisted GPS. It's also got a QWERTY thumb-keyboard and a 2.46-inch, 240 x 320 pixel (QVGA) resolution touch screen.

There's a 3 megapixel camera with auto focus and 4x zoom and a microSD slot.

Inside the iPAQ 910 you'll find a 520MHz Marvell PXA270 processor, 128MB of RAM, 256MB of ROM, and a 1940 mAH Lithium Ion battery.

The smartphone measures 4.45 x 2.53 x 0.63 inches (113 x 64 x 16 millimeters) and weighs 5.4 ounces (154 grams).

It runs on Windows Mobile 6.1.