Apple has rolled out iOS 12.1.2, macOS 10.14.2, and tvOS 12.1.2. According to Apple’s release notes, iOS 12.1.1 other features and improvements include:
Notification preview using haptic touch on iPhone XR
Dual SIM with eSIM for additional carriers on iPhone XR, iPhone XS, and iPhone XS Max
One tap to flip between the rear and front-facing camera during a FaceTime call
Live Photo capture during one-to-one FaceTime calls
The option to hide the sidebar in News on iPad in landscape orientation
Real-time text (RTT) when using Wi-Fi calling on iPad and iPod touch
Stability improvements for dictation along with VoiceOver
Bug fixes, including one for the HomePod the involve HomePod LEDs illuminating during Group FaceTime calls.
The iOS 12.1.1 update is available on eligible iPhone and iPads in the Settings app (Settings > General > Software Update).
macOS 10.14.2 Mojave contains security enhancements and bug fixes. To download it, go to the Settings app and click Software Update.
tvOS 12.1.1 boasts bug fixes and usability enhancements. You can initiate the update via the Settings menu on the Apple TV.