Researchers investigating iOS 6 have found a new toggle in the settings of the coming-this-fall update that allows iPhones to automatically switch to cellular data if the Wi-Fi signal in use is not functioning or the signal becomes too weak. While the iPhone and most smartphones can move to cellular when Wi-Fi isn't present at all, the new feature in iOS 6 allows the automatic change even if Wi-Fi is present but doesn't have a good Internet connection, or when the signal is too weak to work reliably.
