I've been messing in the unknown.bundle folder and changed some settings in the carrier.plist. Unfortunately i wasn't aware of the signature check in FW 4.2.1 so now the file is screwed and i didn't make a backup...

Can someone upload the original carrier.plist located in /System/Library/Carrier Bundles/Unknown.bundle/

I'm on a 3GS 4.2.1 JB.