The xpPhone can wake Windows from standby mode to receive calls and text messages. It has a battery life of seven hours when not in standby mode, and with a larger battery it can run for 12 hours.
A customised chip from AMD powers this mix of a mobile phone and a pocket-sized computer, which is made by In Technology in the southern Chinese city of Guangzhou.
The device has a pull-out QWERTY keypad, a 120GB hard disk and a 4.8 inch LCD touchscreen with a resolution of 800 by 480 pixels. It weighs 400 grams and is 2.5 centimeters thick.
The xpPhone will go to market in China in about three months and later be marketed worldwide, said Brad Wu, vice president of In Technology.
The xpPhone will support Wi-Fi, optional WiMax, GPS and next-generation mobile.
Later this year, In Technology will release a version that supports the China-developed 3G mobile standard that the country is currently trying to promote, TD-SCDMA (Time Division Synchronous Code Division Multiple Access).
The company declined to give details of the computer's microprocessor, which it called the 'AMD Super Mobile', or how it will make phone calls from Windows XP.