Top 10 Difference Between GSM And CDMA You Should Know

Well, if you have a mobile phone then you be aware of GSM and CDMA networks. There are two basic technologies that come in mobile phone. GSM and CDMA represent a gap that you can’t cross.

Most of the times while trying to recharge your number at the telecom shop or online, they must have asked you about your network type, whether it is GSM or CDMA.

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So, what is the different between these two technologies? These are radio system used in cell phones. Don’t worry if you are not from technical background, we will try to explain both these technologies and the real difference between them so that you could understand it easily and quickly.

10 Top difference between GSM and CDMA

1. What are these technologies?

GSM stands for Global System for Mobile Communications while CDMA stands for Code Division Multiple Access in the context of mobile networks.

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GSM is the world’s most profile mobile standard provided with set of rules how a mobile network should work and almost 82% market share and enjoy GSM globally. Whereas CDMA is the more dominant standard that related only to radio portion of technology.

2. Network Service

In GSM, it consists of various network towers, like for every cell there is a corresponding network tower which server mobile phone in that particular area.

While in CDMA, there is only is only one physical channel for every device in coverage area and it provides a special code for that area. When this special code is used the signals are multiplexed and these signals are sent by same physical channel only.

3. Type of Storage Used

GSM use SIM card as onboard memory. SIM (Subscriber Identity Module) card, identifies user and store all the related and relevant information like network type, phone number on the handheld. Even it allows you to switch between SIM cards and enables you to carry all your contacts.

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CDMA has its own service that stores user data like phone book, scheduler on the operator database. That is, it used internal memory as storage media. And it makes it little difficult to swap over new handset.

4. Data Transfer

GSM and CDMA both use different data transfer methods. GSM uses high speed wireless data technology including GPRS (General Packet Radio Service), 2G, 3G, 4G and LTE.

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While CDMA uses 3G, 4G, LTE, EVDO as data transfer methods.

5. Frequency Band

GSM uses multiple frequency bands including 850/900/1800/1900 MHz whereas CDMA uses single frequency band and that is 850MHz.

6. Network Service

In GSM, every number is identified by its SIM card while CDMA is dictated by user’s device only.

7. International Roaming

GSM provides multiband capability that makes it more accessible across the globe. When it comes to international business, GSM leads the market as it is used by more than 75% of the market.

Because of no multiband capability, that makes it less accessible. CDMA is not use in multiple countries but it has dominant standard only in US while GSM has dominant standard across the world except US. You can travel to India, Europe, Asia with the same cell phone.

8. The Technology Behind

GSM and CDMA both are mobile access technologies that provides you way to make phone calls and Internet connection. GSM uses time division system while CDMA uses code division multiplexing.

In CDMA, every data call is encoded with unique key when they are transmitted for the first time. While in GSM, voice transformed into digital data and transmitted over the channel. In this, receiver first listens only to the assigned time and then call back together, so, in this way call takes turn.

9. Interaction between GSM and CDMA

Both technologies should play nice role with each other as both are different but practically this is not the actual case. High powered GSM signals cause overloading and jamming to CDMA receivers while high-powered CDMA signals raise noise issue for GSM receivers.

10. Popularity and Market Share

In the market space, GSM is spread all over in Europe and Asia, even AT&T and T-mobile are based on GSM technology. Also, in China GSM used by people but in India Bharti, MTNL, Vodafone, Airtel, Aircel, Idea, BSNL, all are based on GSM except Reliance which provided both GSM and CDMA facilities.

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