watchOS 4.3.2 (build 15U5053b) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-05-30T17:06:46Z. The update package is 188.36 MB. This is a delta (partial) update that requires 4.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3fadbfcdbd8eb8dc273d7273cb414c71f8bcfa37.zip.