watchOS 5.2 release notes:
This update includes new features, improvements, and bug fixes:
ECG app on Apple Watch Series 4 now available in [red]Hong Kong[/red] and some regions in Europe. For a list of available regions, visit:
https://www.apple.com/watchos/feature-availability/
Irregular heart rhythm notifications now available in Hong Kong and some regions in Europe. For a list of available regions, visit:
https://www.apple.com/watchos/feature-availability/
Adds support for AirPods (2nd generation)
Supports real-time text (RTT) for phone calls
For information on the security content of Apple software updates, please visit this website:
https://support.apple.com/HT201222