Quote:
Originally Posted by jmcgee_jr
Actually China and Taiwan use CDMA heavily still. And no ATT and TMO do use dif freq for 3g. Att is 850 and 1900 as you stated and TMO is 900/1700/2100. TMO matches what most other countries in the world use for 3G. ATT and Rogers are the only ones using the 850/1900.
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actually, your partly right, AT&T uses 850 or 1900 depending on what area in the country they own spectrum, most of the 3g phones that are 3g smart phones come with the required 2100 MHz. when your talking about T-mobile's 3g compared to AT&T, yes they use different Frequency's, they use band IV: 1700 MHz down, 2100 MHz up. AT&T users Band II: 1900; and band V: 850, as i mentioned earlier, depending on the area. No telecom company here in the states uses Band VIII: 900, that band is more prevalent in Asia and Europe.
UMTS frequency bands - Wikipedia, the free encyclopedia