Jag har inte källan, men hittat på Nätet:
Scott Boone
In response to David Charlap, LTE isn't "the same everywhere". I think, in his follow-up, he realizes that, in speaking about 5-band LTE.
The chipset in the new iPad, the Qualcomm MDM9600, already supports *all* the bands of LTE worldwide. The problem, however, is not with the chipset's adequacies; it falls in the signal amplification and reception stages! The add-on chips that perform power regulation and tuning are not "wide band". The "next generation" of said chips *may* bring that capability, but, as it stands, the frequency bands need to be hardwired right now.
Still, unfortunately for US consumers, Apple has chosen to not engineer in what current technology does allow: a single LTE-compatible device for *all* US carriers - meaning, Apple could have produced an iPad LTE that would have worked with all US carriers right now, which would have been a boon to consumer-choice in truly "competitive" US market.