Apple have disabled the capability of updating the Carrier files (via IPCC) in itunes 8.2 but If you want to update your carrier files with the latest itunes 8.2 and itunes 9.0 you can do it this way.
On Windows it may rename the file to .zip to just rename it back to .ipcc

Make sure itunes is not running

(after payment, please login using the wordpress user account that you used to register on the blog)

To view the rest of this post buy for Only 2 USD

Click to signin to see the content if you already bought it.