What is CDMA (Code Division Multiple Access)?

CDMA (Code Division Multiple Access) is a wireless communication technology that allows multiple devices to share the same frequency band by assigning each call or data session a unique code. This enables efficient use of spectrum, better call quality, and enhanced security compared to older technologies.

CDMA was widely used for 3G networks by carriers like Verizon and Sprint in the U.S. before being replaced by 4G LTE. Unlike GSM-based networks (which use SIM cards), CDMA devices were traditionally locked to a specific carrier and did not require SIM cards for authentication.