GSM CDMA Features GSM service uses SIM (Subscriber Information Module) cards to carry the phone number of the mobile and 250 or more contacts. Portable between phones so nothing is lost with a handset change. Lose a phone? Borrow a friend's extra. Each handset has a unique serial number to provide security. CDMA service uses older ESN (electronic serial number) technology where each phone is assigned a unique serial number to identify the mobile. If the phone is damaged everything is lost, and to change handsets the new phone will not function until the serial number is activated. Coverage AT&T Wireless' GSM technology is used in most countries around the world. If you want to travel outside the country, just call to activate the service and go. No handset change required with modern multi band phones. CDMA service is very limited in coverage and not used outside of North America.
totallywirelessinc.com 2007 All Rights Reserved Customer Service