Simply place your phones Sim Card (AT&T, Cingular, T-Mobile or any Sim Card) in the Air Card slot and insert the unit into your PCMCIA port. http://www.1saleaday.com/?referrer=dealnews Alternative to tethering...? Bob ________________ Robert Calhoun Smith Jr in DC M/V MARY KATHRYN Hatteras 58 LRC Ft. Pierce, FL