So which of these support USA 3G signals and which support all of at&t's GSM frequencies? I think T-Mobile 's singular GSM1900 is usually covered by all tri-band and up GSM phones, which these are right?
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So which of these support USA 3G signals and which support all of at&t's GSM frequencies? I think T-Mobile 's singular GSM1900 is usually covered by all tri-band and up GSM phones, which these are right?