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  • Quad band cell phones feature radio transmitters and receivers for each of the four GSM cellular telephone bands. Quad band phones automatically switch to the frequency in use in a particular part of the world.

    Global Cellular Frequencies

    The Global System for Mobile (GSM) telephones defines four frequencies as standards. Different countries and carriers implement different frequencies, depending on other factors like frequency usage by other carriers or industries.

    850 MHz

    The 850 MHz frequency is used primarily in the Western Hemisphere. Countries using this frequency are the United States, Canada, parts of Latin America, and parts of Brazil. It is, however, used in Japan and South Korea.

    900 MHz

    The 900 MHz frequency band is used in Africa, Europe, parts of Brazil, and most of Asia.

    1800 MHz

    The 1800 MHz band is used in Africa, Europe, Brazil, Australia and Asia.

    1900 MHz

    The 1900 MHz band is used in the United States, Canada, Latin America and parts of Brazil.

    Source:

    GSM World: Frequency Bands

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