The long-awaited firmware can finally be downloaded. Since a Chinese package has been installed before, you need to uninstall Unicode font hack. The firmware version of the machine is 2.3.3. update it to 2.3.4 first, and then upgrade it to 2.5.2, firmware versions are as follows:
Kindle 2.5.x firmware upgrade files
Downloadable Version:
2.5 . 2
Kindle 2 Global (which was at 2.3.4) [13.2 MB]
2.5 . 2
Kindle DX global [13.3 MB]
Http://charles-reace.com/Kindle_Hacks/update25/
Note: After the upgrade, Unicode font hack 0.3 does not support Chinese Version 2.5.2. You need to wait for a new Chinese package.
In addition, prepare to install the USB network and replace the font in Chinese. However, due to a temporary impulse, the hack is not installed before the upgrade. Therefore, you must wait until the USB network supporting version 2.5 is released.
Update @ 2010-06-15 official firmware:
Http://www.amazon.com/gp/help/customer/display.html? Nodeid = 200324680