Originally Posted by queshaw
Someone pointed out AT&T's microcell:
From AT&T 3G MicroCell™ Frequently Asked Questions
Q. Is AT&T 3G MicroCell compatible with devices like the Kindle™, Nook™, Sony Reader, or QUE™?
A. Not at this time. Support for these non-traditional wireless devices on 3G MicroCell is currently being reviewed
Even if this was not the case, you would still likely need an AT&T prepaid cell phone contract in addition to the MicroCell.
Side-loading via USB works well enough. Or you can return the KDX and get a Kindle 3.