Siemens introduced three new phones for the U.S. at CTIA this ... with the addition of GSM 850 to support carriers such at AT&T Wireless and Cingular. Unlike last year, all of the new models ...

Although Cingular is the largest cell phone service provider in the U.S., it has been losing ground to Verizon Wireless, which has been gaining new subscribers at a faster rate and which has ...