[Tiersten]

Originally Posted by daffy4u

Thanks, I've also updated the Kindle Serial Numbers wiki page to reflect your suggestion.

Amazon state that it is generally the B006 for US and B00A for Europe if you've getting a 3G+WiFi unit but with the additional caveat

"We automatically ship your Kindle with the best built-in wireless card based on the shipping country you select during checkout. If your country is not listed above, please use the serial number instructions to determine which download to use."