watchOS 4.3.2 can be downloaded through the dedicated Apple Watch app on the iPhone by going to General --> Software Update. To install the new software, the Apple Watch needs to have at least 50 percent battery, it needs to be placed on a charger, and it needs to be in range of the iPhone.
As a 4.x.x update, watchOS 4.3.2 is minor in scale, focusing on bug fixes and under the hood performance improvements. No major new features were discovered during the beta testing period.
watchOS 4.3.2 may be one of the last updates to the watchOS 4 operating system now that Apple has shifted its focus to watchOS 5. watchOS 5 is available to developers and will see a public release this fall.
Introduced at the Worldwide Developers Conference in June, watchOS 5 brings a push-to-talk Walkie-Talkie mode, support for automatic workout detection, a Podcasts app, new features for the Siri watch face, and more. For full details on what's coming in watchOS 5, make sure to check out our watchOS 5 roundup.