watchOS 4.3.2 (build 15U5053b) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-05-30T17:06:43Z. The update package is 105.48 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: f5a50c557f407475582ac74eb60910643b00f749.zip.