watchOS 4.3.2 (build 15U5062a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-06-13T17:08:24Z. The update package is 368.8 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: 2f70040a46e72dda9f3ed097be93138341a335a1.zip.