watchOS 4.3.2 (build 15U70) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-07-09T17:08:20Z. The update package is 378.18 MB. This is a delta (partial) update that requires 4.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fd9aa68c30b100bb81e4a99f75fab740effe8b38.zip.