watchOS 5.0 (build 16R5349a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-08-13T17:06:59Z. The update package is 236.66 MB. This is a delta (partial) update that requires 5.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 36e183f8079ed43087d0e636f5f504fe120cc3a3.zip.