Last week Apple unveiled its first “global” iPhone in the United States. The iPhone 4S, which hits stores this Friday, will support both CDMA and GSM wireless standards to accommodate all three of its U.S. carriers: AT&T’s GSM network and Sprint/Verizon’s CDMA networks.
CDMA technology, the standard used by Sprint and Verizon, has a minor presence around the world compared with GSM (Canada, Mexico, New Zealand, China, Taiwan, South Korea, parts of the Caribbean