Have a locked iPhone and recently fired up iTunes and found this message below? What does this mean…?

The standard Apple explanation from the Knowledge Base:

iTunes 7.7 and later has the ability to update the carrier specific settings on iPhone with iPhone 2.0 software or later. Carrier settings updates are small files (about 10k) that are downloaded from iTunes to be installed on your iPhone. The carrier settings can include updates to the default APN (how iPhone accesses the carrier’s cellular data network), special dialing codes at Settings > Phone > [Carrier] Services, default settings for Stocks, Maps, Weather, and other items.

So what’s actually in this update?

Logo replacements, apparently, for AT&T’s upcoming MicroCell service (at the time of this writing, the page is in maintenance mode). 2 images, light and dark versions of the image on the left.

[via MobileCrunch]