“Tri-band” is included in 3 frequency, the frequency of these three is GSM900Mhz, DCS1800Mhz and PCS1900Mhz, and so on, the so-called “tri-band mobile phone” refers to mobile phones can receive GSM900M, DCS1800Mhz, as well as the three frequency bands PCS1900Mhz Signal to choose from, that the band’s strong signal on the choice of base station [...]
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