Tri-band phones are wireless phones that operate on three bands. Code Division Multiple Access—or CDMA—and Time Division Multiple Access—TDMA—tri-band phones works on 1900 megahertz and 800 megahertz digital frequencies, as well as 800 megahertz cellular frequencies. Tri-band GSM, or Global System for Mobile Communications, compatible phones are all digital phones that work on 1900Mhz in the United States and 1800 or 900Mhz in other parts of the world. Numerous manufacturers offer varied models of tri-band phones. Writer Bio
