In the field of wireless cellular phones, there are two great competing networks available
. One is Code Division Multiple Access or CDMA and the other is Global System for Mobile Communications, known as GSM. CDMA implies to Code Division Multiple Access, a digital technology in which the transmitted signal frequency varies deliberately. This technology allows the signal to vary that gives an output of more bandwidth than would be allowed if the frequency was not varied. GSM or Global System for Mobile communications is a digital technology that provides every user a fixed frequency on their network.
These technologies are used by the various cellular carriers to provide service to the user. Each network is different, but with the time they are changing and acquiring characteristics that make them indistinguishable. GSM mobile phones use SIM card technology. Call quality is comparatively secure and good in GSM. More and more value-added services like GPRS, EDGE etc are getting added to it. Power consumption is less in GSM handsets as compared to CDMA handsets. GSM phones are activated differently. Each account is associated with a SIM card or Subscriber Identity Module. These days many GSM network operators have roaming agreements with foreign operators. This gives the users the facility to use their mobile phones while traveling abroad.
CDMA phones are not card-enabled. The mobile phone used on the CDMA networks can only be used on those networks. One of the advantages of CDMA is the cost effectiveness than GSM. Now the call quality is better than GSM. CDMA mobile phones are already available in great quantity in the market. They provide good services and entertainment to their users. The advanced cameras give people the facility to take good quality pictures and later store them in the enormous memory space. Connectivity is also outstanding in CDMA handsets. One can make calls from almost any parts of the world with no difficulty. This is the reason that CDMA handsets are getting popular and are available at entry-level to high-end mobiles to attract users from each and every section and deliver quality to the users.
Now days, CDMA and GSM handsets provide equal facilities. In some cases, CDMA operators are giving better facilities and services as compared to their counterpart. Since service operators are delivering better services, so Mobile Companies are also coming out with better quality products to keep-up pace with the service-sector.