A new feature in iOS 6 will allow apps having trouble with WiFi to switch to cellular data until the WiFi problems have been resolved.

The feature, called “WiFi Plus Cellular” has been added to the General Settings menu in iOS 6 beta 4, which was released this week. If the feature is included in the final release of iOS 6, which is set to arrive this autumn, users will be able to tell their iOS devices to use mobile data to download iCloud Documents, iTunes purchases, Passbook updates, and Reading Lists if the WiFi is being temperamental.

See also: Apple's iOS 6 release date, rumours, and leaked images

On an iPhone 4S or later, iOS 6 could also be able to do the same for FaceTime, in an attempt to prevent dropped video calls, reports Apple Insider. Apple announced that the new operating system would allow FaceTime over 3G when it revealed the software in June. 

It is expected that Apple will launch its sixth-generation iPhone with iOS 6 in autumn, with the latest rumours citing a 12 September special event.

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