An error message spotted in iOS 5.1.1 suggests that Apple is planning to allow users to make FaceTime calls over 3G.

Currently, the only way to use FaceTime without WiFi connection is to jailbreak your iPhone, but this can violate the warranty of your device.

Romanian website, iDevice, spotted an error message on Friday, which appeared when the user tried to disable the 3G connection while someone was trying to FaceTime call him. The error said: "Disabling 3G will end FaceTime. Are you sure you want to disable 3G?"

Gizmodo reports that this new error message is the first to mention 3G in relation to FaceTime.

Will iOS 6 bring 3G capabilities to FaceTime? Apple's next mobile operating system is rumoured to be launching in June, at the Worldwide Developers Conference, alongside new MacBooks, iMacs, OS X Mountain Lion, and maybe even a new iPhone.