Apple has released iOS 11.4.1, HomePod 11.4.1, watchOS 4.3.2 and tvOS 11.4.1.

iOS 11.4.1 includes bug fixes and improves he security of an iPhone or iPad. According to Apple’s notes, it:

° Fixes an issue that prevented some users from viewing the last known location of their AirPods in Find My iPhone;

° Improves the reliability of syncing mail, contact, and notes with Exchange accounts.

iOS 11.4.1 can be by opening the System Preferences app on your iPhone or iPad. Then go to General > Software Updates. 

HomePod 11.4.1 includes general improvements for stability and quality. A 

HomePod can update automatically on its own or you can manually prompt it to update in the Home app. 

watchOS 4.3.2 and tvOS 11.4.1 include “improvements and bug fixes.” The former can be installed via the Apple Watch app on your iPhone. The latter can be installed on an Apple TV manually if the set-top box isn’t set to update automatically. Go do the Settings app and choose Software Update.