IOS 6.1.5 build 10B400

iOS 6.1.5 build 10B400 is the official RTM build of iOS 6.1.5, which was released to the public on 14 November 2013. It is only available for the iPod Touch 4th Generation.

Similar to iOS 7.0.4, this build fixes an issue that would cause FaceTime calls to fail.