China Dual band Cell Phones - Dual Band Mobile Phones Wholesale
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Dual Band Mobile Phone GSM Network History
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In just a few short years GSM developing, GSM900MHz become the dominant global standards, like most of the GSM operators worldwide are 900MHz chose the band. Now GSM900 frequency resource shortage, has become a bottleneck in mobile network development.
In 1992, ESTIMOV recommended personal communication (PCN) scheme. The first DCS1800 called the system because of its technology and GSM900 very similar, after GSM1800 renamed.
Dual band GSM networks are actually GSM two frequency digital mobile communication system network stack. The biggest advantage is, Dual Band mobile phone users without notice in the state, in 900MHz and 1800MHz two best choice between networks automatically flow service channel and automatic switching, thus avoiding the phenomenon to drop words. Even in the signal is weak, Dual Band Cell phones can also have a good conversation quality.
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