The main difference between the two technologies is in the way the subscriber accesses the allocated frequency.
In GSM : The frequency band is divided into several parts which are further subdivided into Timeslots which are then made available to the subscriber. This technology uses TDMA (Time Division Multiple Access) to generate the said timeslots which serve as a differentiating factor amongst the several subscribers.
In CDMA : The whole frequency band is available to the users. Each user is allocated a unique code in order to differentiate them hence the name Code Division Multiple Access. This info is decoded at the receiving end.
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ReplyDeleteCDMA(Code Division Multiple Access) is a digital cellular technology that uses spread-spectrum techniques.CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built.It doesn't have sim card.
ReplyDeleteThe reason for more GSM usage is that the international Roaming of GSM is Very good and it has sim card,So you can easily swap your sim card when you need.If we got a locked phone means we can unlock it by getting the unlocking service from any one of the online service provider like Unlock-Zone.com