watchOS 4.3.2 (build 15U70) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-07-09T17:08:21Z. The update package is 339.65 MB. This is a delta (partial) update that requires 4.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2a0f8c1333b6336e8fbfcfd22deb6a0d831c924f.zip.