Sierra Wireless has added five new AirCard 3G data modems to its lineup, including the AirCard 503, AirCard USB 308/309 and AirCard USB 301/302. The 503, 309 and 308 all support high-speed HSPA+ networks, allowing for peak download speeds of 21Mbps. The 503 has a two-in-one design that fits both PC card and ExpressCard slots. The AirCard 503 supports quad-band regular HSPA (850/900/1900/2100MHz) bands.
