There are three major networks used for cell phone communication in the United States. Global System for Mobile Communication, Code Division Multiple Access and Integrated Digital Enhanced Network (iDen). T-mobile, AT&T and their affiliates use GSM, Verizon uses CDMA, and Sprint uses CDMA and iDen. Phones are tied not only to their network type, but to their carrier. i-Wireless is a T-mobile affiliate, so you won’t be able to use your Verizon phone on the i-Wireless network. Writer Bio
