watchOS 5.0 (build 16R5340g) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-08-06T17:12:09Z. The update package is 505.31 MB. This is a delta (partial) update that requires 4.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1ca90c0dd64dad33d6471759ca4fd0c1d8892265.zip.