What is the difference between GSM and CDMA?
They are two different wireless technologies and are not compatible with each other. A GSM cell phone cannot operate using a CDMA network and vice versa. Also, CDMA phones in North America do not utilize SIM cards. GSM service providers in the U.S. include T-Mobile and Cingular/AT&T, while Verizon Wireless and Sprint use CDMA technology.
In cellular service there are two main competing network technologies: Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA). Cellular carriers including Sprint PCS, Cingular Wireless, Verizon and T-Mobile use one or the other. Understanding the difference between GSM and CDMA will allow you to choose a carrier that uses the preferable network technology for your needs. The GSM Association is an international organization founded in 1987, dedicated to providing, developing, and overseeing the worldwide wireless standard of GSM. CDMA, a proprietary standard designed by Qualcomm in the United States, has been the dominant network standard for North America and parts of Asia. However, GSM networks continue to make inroads in the United States, as CDMA networks make progress in other parts of the world. There are camps on both sides that firmly believe either GSM or CDMA architecture is superior to the other. That said, to the non-invested consumer who simp
