What is the Difference Between CDMA and GSM?

Alice williams
2 min readJan 24, 2021

Cellular mobile services are used all around the world for quite a while and still evolving daily. With these solutions, various communication solutions also evolved, and CDMA and GSM are just two of these. CDMA and GSM will be both main technology standards which are known for cellular communication.

The GSM and CDMA transforms the information in the cell telephone into radio waves. However, these technologies are distinguished in the manner by which the calls & information transfer occurs over a network. One of the critical differences between CDMA and GSM is that GSM uses SIM cards to join a cell phone using its system, whereas CDMA doesn’t require any SIM card also works on ESNs (Electronic Serial Number). Within this subject, we’ll know what GSM and CDMA technologies are and how they distinguish from one another in detail.

GSM or Global System for Mobile Communication is a digital cellular communication standard, that can be used for receiving and transmitting voice and data signals over a community. It’s also referred to as the second-generation standard for cellular networks or telecommunication, and it functions on a wedge spectrum. It works on three separate radio frequencies, that can be 900MHz, 1800MHz, and 1900MHz. One of those three frequencies, the 900MHz band frequency is utilized by the First GSM system, and the 1800 MHz band frequency is utilized to offer the extra support for raising clients. The GSM users have taken advantage of this service Short Message System (SMS), where the consumers may communicate with each other using text messages within the specified network.

Benefits of GSM:

Together with GSM technologies, we may have a cheap portable collection and base stations. It enhances spectrum efficacy. The voice or data signals are of top caliber in GSM. CDMA is a acronym for Code Division Multiple Access, That’s also a radio standard like GSM.

The CDMA was created at 2G and 3G creation because the protocol of wireless communication. It’s predicated on the spread spectrum technologies and makes best use of the bandwidth that is available. As it utilizes the spread spectrum technologies, thus allows each user to transmit the information over the whole frequency spectrum in any moment. The CDMA supplies among the very protected modes of communication as a result of its spread spectrum land. It’s employed in UHF or Ultra high-frequency mobile systems, together with frequency bands which range from 800MHz into 1900MHz.

Benefits of CDMA:

It utilizes a predetermined frequency spectrum in an efficient manner. There’s not any limit on the amount of Clients. It’s compatible with other mobile technologies; therefore it permits nation-wide roaming.



Alice williams

My Self Alice, I am Coding Lover Programming Likes as python, C, C++ and Selenium Automation testing etc.