What is the full form of GSM?

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GSM means Global System for Mobile Communication while CDMA means Code Division Multiple Access. Both GSM and CDMA are competing wireless technology for mobile network where GSM has larger market share in the world (75-80%).
CDMA work on a single frequency band of 850 MHz while GSM employs a number of frequency bands namely; 850/900/1800/1900 MHz.
One disadvantage of CDMA is that it is mobile handset dependent while GSM users have a plethora of handsets to choose from. With the launch of Apple iPhone many users in USA have shifted from CDMA to GSM service.
One advantage of CDMA over GSM is that it has faster data rate.


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