Apple has released the first public beta version of iOS 9.1 to members of its Beta Software Program. Program members with the most recent public beta version of iOS 9 installed on a device can go ahead and download the iOS 9.1 public beta as well.
Apple has already released an iOS 9.1 beta for developers. Not much is known about what changes will be included with iOS 9.1, and no time frame for its release has yet been announced. Apple will release iOS 9, this year's major release of the company's mobile operating system, on September 16.