MacRumours reports that Apple has launched "iOS 6 beta 3" to third-party developers, along with Xcode Developer Preview 3 and Apple TV Software beta 3.
The third beta version of the mobile OS reportedly includes new settings for Apple's Maps application, including controls for users to change the volume of the navigation voice and set distances to be displayed in miles or kilometres, and local language tools for map labels.
Developers also told MacRumours that Maps in beta 3 can be set as "normal" or "large"; roadworks or traffic accidents are now being flagged up by the software; and 3D flyover coverage has been added to some maps.
The beta release also revealed that Apple is starting to shift Apple users with me.com email addresses - operated under the previous MobileMe service - over to cloud storage solution iCloud.
"Users signing up for new Apple IDs, or enabling Mail on their iCloud account for the first time, will automatically receive an @icloud.com email address instead of a me.com email address," Apple explained in the iOS 6 update's changelog.
"iCloud users with @me.com addresses that have been used with iOS 6 beta 3 will receive an @icloud.com email address that matches their @me.com address."
Also in iOS 6 beta 3, the Answer and Decline buttons have returned for FaceTime calls; iMessage on iPad now accepts a phone number as a valid contact; and new icons have emerged for junk, trash and archive.
Unveiled in early June at Apple's WWDC, iOS 6 is set to launch this autumn, and most commentators believe that it will be accompanied by the sixth generation of the iPhone.