Some info in this thread is just plain contradiction. For example, the above two quoted posts contradict to each other. Is AT&T tri-band or quad-band UMTS after all?
It comes down to what to believe, because FCC filings contradicts to what people say and what cellphone website says. For example, phonearena lists the band specs of i-317 as this:
GSM 850, 900, 1800, 1900 MHz / UMTS 850, 1900, 2100 MHz / LTE 700 MHz Class 17, 1700/2100 MHz
Here, i-317 is quad-band GSM and tri-band 3G (not what FCC filing says).
Also, the website lists T889 as this:
GSM 850, 900, 1800, 1900 MHz / UMTS 850, 1700/2100, 2100 MHz / NO LTE
Here, T889 has 3G 850, AWS, 2100, which also is not what FCC filing says, besides there is no LTE support.
Some information here has got to be misinformation, but which one is it?