Both. A 3g 2100mhz device will NOT receive 3g from tmobile because it needs the 1700mhz band too. Called aws. I think it's 2100mhz downstream, 1700mhz upstream. It is special vs. the euro standard. The only 3g tmo devices are the ones they sell and 2 data cards sold by stelera wireless. That is all so far. No windows mobile, blackberry or sidekick.
·
·