Ok, lets all just wait a minute before we get too into this one. There are a few sources saying this is all, and it almost completely unconfirmed. This image is what the preference would look like on the screen. It is claimed, that this information was located in the Network.plist file, that controls and saves preferences for the network settings on the iPhone.

Though it seems wild, the information could just turn out to be true. This dump of Network.plist clearly shows references to 3G. It is said that the preference will not show up on EDGE iPhones, but will in the 3G enabled iPhone. It says if by mistake this preference shows up on a EDGE only iPhone, the device will crash.

Note that this is not fake, it is in the beta 5 .ipsw, but will normally not show up on an EDGE iPhone. Turning 3G on will just crash the phone if you use an EDGE phone. If you do not believe me, then decrypt the beta5 rootfs dmg, and see for yourself in /Applications/Preferences.app/Network.plist

[Via iPhone Alley]