watchOS 4.3.2 (build 15U5069a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-06-25T17:13:24Z. The update package is 340.15 MB. This is a delta (partial) update that requires 4.2.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 903e8e371618152c00459ab7dbc19228bd835fa5.zip.