Kindle 3G firmware update 3.0.1 to 3.0.3 by easy 3 steps

1.Go to this link http://www.amazon.com/gp/help/customer/display.html/ref=hp_rel_topic?ie=UTF8&nodeId=200529700
& download Kindle 3G (Free 3G + Wi-Fi) - U.S. and Canadian Customers*: Download 3.0.3  
Your serial number will start with "B006" (My Kindle bought for US Amazon & chose this version)

2.To connect you Kindle by USB cable , then open the Kindle storage disk and drag & drop you download file "Update_kindle_3.0.3_B006.bin" to the disk.

(you will see a lot folder ,just put on the directory & no into any folder)

3.Eject the Kindle to safely disconnect Kindle from your computer and Waiting your Kindle firmware installation and to be auto restart.

finished & check your Version info again

Home => Menu => Setting(show on the screen right down)

If you see "Version:Kindle 3.0.3"

Congratulation

It's easy by 3 steps to update your Kindle firmware.