Vodafone has launched a USB modem stick that is compatible with its HSUPA high-speed mobile broadband service.

The stick connects to Vodafone's mobile broadband service, which was upgraded in December 2007, to offer download speeds of up to 7.2Mbps and upload speeds of up to 1.44Mbps. This is 14 and 22 times faster respectively than the original 3G service launched in 2004, according to Vodafone.

Vodafone said the modem is the smallest and slimmest yet, and supports Windows Vista, Windows XP and Mac OS X. The service is currently only available in parts of central London and at major airports.

The modem is available on a £25 mobile broadband flat rate and prices for the device itself start from just £49 with an 18-month contract.