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Dual band - definition

Dual band - definition

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Cell phone networks work utilizing signals on unambiguous recurrence groups and a telephone should uphold those groups to work with the organization. Double band alludes to the telephones capacity to work with two unique groups. It is critical to indicate which groups precisely.
Networks in various geological areas work on various groups - GSM networks in the Americas utilize the 850 MHz and 1900 MHz groups while networks in Europe, Brazil, Asia and Africa utilize the 900/1800 MHz groups.
For instance a 900/1800 double band telephone won't work in the US and a 850/1900 telephone won't work in Europe. A 900/1900 telephone ought to deal with something like one organization in many nations all over the planet.
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