High Quality Content by WIKIPEDIA articles! Tri-band phones (also known as triband) are mobile phones that support three frequency bands. Having more than one frequency in one device is useful to enable roaming between different countries and continents. Tri-band technology is slowly becoming the norm among many manufacturers.Various countries use different frequency bands for their mobile networks and a tri-band phone can be used on three of these bands, generally speaking, chosen to favour two of the home country's bands, and one for roaming in other countries.2G Tri-band phones are mobile phones that support the GSM 900/1800/1900 MHz bands commonly sold in Europe, Asia and Africa, (for example the LG KE820 is a tri-band mobile phone that is sold in Europe, but works in big cities of America but not so well in suburbs and rural areas[citation needed]). Alternatively the 850/1800/1900 bands (commonly sold in the Americas). The Motorola V300 formerly carried by Rogers Wireless used a rare combination of 850/900/1900. A 2G quad-band (850/900/1800/1900) offers more coverage and is now quite common.