List of cell phone service providers in US?

1) AT&T Wireless: Headquarters: 7277 164th Avenue NW, Building 1, Redmond, Washington 98052. Phone 425-580-6000. .attwireless Network: GSM/GPRS., 2) Cingular Wireless: Glenridge Highlands Two, 5565 Glenridge Connector, Atlanta, GA 30342, Phone 1-866-CINGULAR, Phone 1-866-241-6567 TTY/TDD, .cingular 3) Verizon Wireless: 180 Washington Valley Rd, Bedminster, NJ 07921,Telephone: (908) 306-7000, .verizonwireless 4) Sprint World, 6200 Sprint Parkway, Overland Park, KS 66251, (800) 829-0965 .sprintpcs 5) VOICESTREAM: Headquarters: T-Mobile USA , 12920 SE 38th Street , Bellevue, WA 98006 , Telephone: 1-800-937-8997,.voicestream. and 6) NEXTEL: Headquarters: Nextel Communications, 2003 Edmund Halley Drive, Reston, VA 20191, Telephone: (703) 433-4000, Telephone: 703-433-4700, Telephone: (703) 762-7500, tnextel.