International version

On October 7, 2009, Amazon announced an international version of the Kindle 2 that works in over 100 countries. It became available October 19, 2009. The international Kindle 2 is physically very similar to the U.S.-only model, although it uses a different mobile network standard.
The original Kindle 2 uses CDMA2000, for use on the Sprint network. The international version uses standard GSM and 3G GSM, enabling it to be used on AT&T's U.S. mobile network and internationally in 100 other countries.
Kindle 2 International Version is believed to have a noticeably higher contrast screen, although Amazon does not advertise this.
On October 22, Amazon lowered the price on the international version from $279 to $259 and discontinued the U.S.-only model. On June 21, 2010, hours after Barnes & Noble lowered the price of its Nook, Amazon lowered the price of the Kindle 2 to $189, undercutting the Nook by $10.