UPDATE: We finally have some details. According to the iPhone Blog, a user reporter noticing a difference in the carrier.plist file. The file now contains PNG images for AT&T’s MicroCell service. The update seems to be in preparation for the eventual release.
AllowPrefixMatching
CarrierName
AT&T MicroCell
DefaultImage
DefaultCARRIERATT M-Cell.png
FullScreenOpaqueImage
FSOCARRIERATT M-Cell.png
At this point, very little is known about the carrier settings update that Apple has pushed down through iTunes this evening. Normally, carrier settings updates are small files that consist of updates to the default APN, special dialing codes, default settings for stocks, maps, weather and what have you.
All that we know at this point is the update seems to be for AT&T subscribers, updating carrier settings from 2.9 to 3.1. That is it so far.
Like always, hold off on the update if you are concerned until we have more information.
