1) CDMA : Code division multiple access 2) GSM : Global System for Mobile Communications
In the most general sense, CDMA sends wireless signals in a series of unique codes, while GSM divides signals into a series of individual time slots (for more information, see the glossary in our quick guide to 3G). To you, that means a few things. CDMA networks tend to have more capacity so that more callers can use the network at one time, and they tend do a better job during handoffs, when your call is passed from one tower to another. CDMA also has more widespread coverage in the United States, especially when you count analog roaming, and offers more stateside high-speed data networks. Finally--and I know I'm opening a Pandora's box here--CDMA supporters, who are likely to be the most vociferous defenders, usually argue that their technology offers better call clarity. Keep in mind, though, that it's not necessarily a fact since individual call quality is a matter of opinion, and it depends on a multitude of factors that can be beyond your control.
On the other hand, GSM has its own advantages. GSM's advocates argue that because it is a newer technology (though it is based on the older TDMA networks), it's better equipped for the conversion to 3G. Also, GSM is more widely used than CDMA, with service available in more countries around the globe. CDMA is adding regions as time goes on, but if want a true world phone, GSM is your choice. GSM also uses a SIM card, so it's much easier to switch your phone number and your contacts between handsets. And speaking of phones, GSM phones usually require less battery power than CDMA, and at least in the United States, the GSM carriers (Cingular and T-Mobile) have a more varied selection of phones that include such higher-end features as Bluetooth than do CDMA providers Sprint and Verizon
Answered by
Pammu
at
2:26 PM on October 08, 2007
