GPRS is the attribution for General packet radio service. This is usually found in 2G mobile phones. The main purpose of GPRS is to make data transfer faster and more accurate. As the name indicates in GPRS data is transferred in small packets in parallel data transfer ports. Usually many GPRS phones have multiple slots. The number of slots will range from 2 to 5. Usually the timeslots are divided for either uploading or downloading purposes. If the user is downloading some data the number of timeslots that are allocated for uploading are minimized and the number of slots used for downloading the data are increased thus giving a faster browsing experience.
EGPRS (also known as EDGE the synonym for enhanced data rates for GSM evolution) stands for enhanced GPRS and makes the data transfer more faster by using enhanced coding techniques which allows greater transmission rates. And this is what brings the speed of 3G to our modern gadgets. With EGPRS you can do live video chatting. EDGE is usually three times faster than GPRS.
The fastest speed that can be achieved through the GPRS service is 80kbps. There are separate coding schemes which can give you variable speeds depending on the number of timeslots being used. Generally the fastest speed that a mobile having 5 timeslots will give is up to 80kbps but practically the speed will be up to 40kbps. Thus the maximum speed per timeslot will be 18-20kbps. Whereas an EGPRS enabled mobile will give you up to 230kbps and you may expect a practical speed of 180-200kbps.
Whereas CDMA 2000 is another technology which will allow several users to share a bandwidth of various frequencies. Thus various users can be multiplexed over the same channel. The modulated coded signal will have a much higher bandwidth than the data which is being communicated. Thus this means a more faster working mobile with the processing capabilities of the processor remaining the same.
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