GSM Vs CDMA
As the name suggests (Code Division Multiple Access), there are many devices which use the same spread spectrum (hence multiple access). There is one physical channel, and a special code for every device in the coverage network. Using this code, the signal of the device is multiplexed, and the same physical channel is used to send the signal (the codes may or may not change). For example: There is a street on which many buses ply. Obviously, the bus will have many commuters, and they will have to buy the tickets to travel on the bus. In CDMA, the commuter is like your mobile phone, the tickets are your codes, the bus is a multiplexed carrier signal, and the street is the spread spectrum.GSM vs CDMA Comparison
Call Quality: This is an area where CDMA scores substantially over GSM. Statistics are hugely in favor of CDMA. Various factors such as echoes, call dropping, or voice distortion are almost non-existent in CDMA, whereas in GSM, there is a high probability of errors. To give you an analogy, the bus on the street will continue to ply even when it"s full, but if the honeycomb has reached full capacity, the honey cannot be deposited.
GSM vs CDMA Call Qality Score: CDMA scores. Goal count 0-1.
Carriers: GSM is one up on CDMA as far as carriers are concerned. The law requires CDMA carriers to provide handsets to users, for which the users cannot change their carriers. Whereas, GSM users can change their carriers whenever they want.
GSM vs CDMA Carriers Score: GSM scores. Goal count 1-1.
Network: It"s an on-going battle between the two. Both the technologies are continuously improving the qualities of their network and adding various aspects to it as well.