4G LTE connectivity in US where available, 3G / EDGE / GPRS in other locations; utilizes Amazon
Whispernet to provide wireless coverage via AT&T's 4G LTE high - speed data network in the U.S and AT&T partner networks
outside of the U.S. See Amazon Device Terms of Use.
However, given the size of their business, they don't strike me as lacking business sense, and I'd bet good money that availability to those
outside the US is something they're looking into, but because of the unique qualities of the Kindle (the
Whispernet and their agreement with a cell phone provider) it wouldn't be quick work to do this worldwide.