Comment Re:Verizon = US, right? (Score 1) 555
The problem isn't triband UMTS radios - if they did do exist, it doesn't matter, because NONE of the four major US mobile providers have 3G roaming agreements - not Verizon and Sprint with EVDO, and not ATT and TMo with UMTS. And, as you say, the Balkanization of frequencies doesn't help a bit.
Sprint and Verizon DO use the same EVDO bands, but of course there's no roaming agreement, so you're stuck with 1xRTT if you're roaming. A truly sad state of affairs.