watchOS 4.3.2 (build 15U5053b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-05-30T17:06:56Z. The update package is 100.53 MB. This is a delta (partial) update that requires 4.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4f0546786b5f2497b693759ce5882fc85bd46077.zip.