What is a Quad- Band phone?
A Quad-band GSM phone operates on the four internationally designated GSM frequencies- 850, 900, 1800 and 1900 MHz. The capability to seamlessly handover between the four bands offers operators major capacity gains. The 850 frequency is used in North America, Latin America and parts of the Caribbean.
A quad-band phone is a phone that operates on all four major frequency bands, which makes it a world phone in that it can operate on all major GSM networks worldwide. The four GSM frequency bands are GSM 850 MHz, GSM 900 MHz, GSM 1800 MHz, and GSM 1900 MHz. The GSM 850MHz and GSM 1900 MHz bands are used in North and South America, and the GSM 900MHz and GSM 1800 MHz bands are used in most other parts of the world.