watchOS 4.3.2 (build 15U70) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm), released on 2018-07-09T17:08:25Z. The update package is 339.6 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: b3b52345cd9a1ab62c63c68dd3edf25c08ee17a3.zip.