GSM Frequency Allocation

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    Although it is possible for the GSM cellular system to work on a variety of frequencies, the GSM

    standard defines GSM frequency bands and frequencies for the different spectrum allocations that are

    in use around the globe. For most applications the GSM frequency allocations fall into three or four

    bands, and therefore it is possible for phones to be used for global roaming.

    hile the ma!ority of GSM activity falls into !ust a few bands, for some specialist applications, or in

    countries where spectrum allocation requirements mean that the standard bands cannot be used,different allocations may be required. Accordingly for most global roaming dual band, tri"band or

    quad"band phones will operate in most countries, although in some instances phones using other

    frequencies may be required.

    GSM band allocations

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