Romanian Apple website iDevice has discovered a hidden warning message within iOS 5.1.1 that states: "Disabling 3G may end FaceTime," sparking rumours that the software will no longer be limited to WiFi.
FaceTime is a chat application that enables owners of iOS devices and Mac OS X computers to hold video conversations with one another over a WiFi connection.
Apple introduced the app in 2010 with the release of the iPhone 4. Upon its launch, the late Steve Jobs explained that it would not be available over wireless cellular networks, but plans were in place to "work a little bit with the cellular providers" to rectify this.
Appleinsider speculates that some data providers could choose to block or restrict the service on their network, as AT&T have done with tethering in the past.
Apple is thought to be working on a next generation model of its iPhone following the news that it has assumed control of the iPhone5.com web domain.