Difference between CDMA and GSM

Ans1. 
Difference between CDMA & GSM- 
These are the two different means of mobile communication being presently used world wide. The basic difference lies in the Multiplexing method used in the airial communication i.e. from Mobile Tower to your mobile and vice versa...

CDMA uses Code Division Multiple Assess as the name itself indicates, for example you are in a hall occupied with number of people speaking different language. You will find that the one language you are knowing will be heard by you and the others will be treated like noise. In the same manner each CDMA mobile communication takes place with a "code" communicating between them and the other end if one is knowing that code then only it can listen to the data being transmitted i.e. the communication is in the coded form.

On the other hand GSM uses Frequency Division Multiplexing in which each user is allocated a particular bandwidth till the communication is taking place.

Ans 2. About the sim card....
CDMA handsets do not use SIM cards. The handset is assigned a number from the telecom operator and get incorporated in itself. CDMA handset have RSN number which gets linked to a specific number assigned by operator.
Ans 4. full form of GSM & CDMA.
GSM - Global System for Mobile communication.
CDMA - Code Division Multiple Access

Another Answer::::

gsm is stands for global system for mobile communication. it use tdma & fdma techniques as access mechanism . in gsm we devide bandwidth in to time slots for better utilization of bandwidth.cdma stands for code devision muliple access it use cdma techniques as access mechanism . in cdma we allocate a unique code for every user saparately and allocate bandwidth to user

Answer:::::

The main difference between GSM and CDMA is: In GSM, the entire frequency band is not available to the end-user, while in CDMA the entire frequency band is available to the end-user. So, the Frequency Re-use factor is 1 in CDMA. 

GSM Works as follows:
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     The entire frequency band is divided into chunks and each such chunk is divided into timeslots and each such portion is made available to a user. 

CDMA Works as follows:
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    The entire frequency band is available to the user. So, in order to differentiate, the transmission from each user is "spread" or coded using an unique code given to individual user. At the receiving end, the spread information is decoded.
Answer:
GSM is a Global Syatem For Mobile Communication.GSM Operates 3 bands, 1) GSM 900 2) GSM 1800 and 3) GSM 1900. GSM 900 & GSM 1800 are used in india, But, GSM 1900 used in USA.GSM and CDMA techniques can be explained with an example,suppose there are 10 persons in a room and they want to communicate with each other .How can they communicate? First method:One persons speaks at one time that means we
have provided a definite time interval to that person.-GSM Second method :all the peers  speak at a time in a different language which we call as CDMA
CDMA stands for Code Division Multiple Access and GSM  stands for Global system for Mobile Communication.  In CDMA phones the software is integral with the phone 
instrument and in the case of GSM phones it is through the 
SIM Card.

CDMA phone instruments are dedicated to the service  provider. GSM phone instruments are portable across service providers through SIM cards.
Answer:::::::::::::

GSM: In GSM only 30 or 35 peoples can call at at time in a  singal carrier but InCDMA apprx 70 peoples can call in a  singal carrier at a time


Answer:::
gsm is stand by globle system for mobile communication,gsm frequency band is 900mhz-1800mhz,this is communicate all rural area in all time,cdma is same frequency band but can not available in rural area in all time.