watchOS 5.0 (build 16R5322d) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-07-17T17:11:12Z. The update package is 675.73 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: 3a29c07d1905dc2a3e5664492b4fe5e03d6b1a95.zip.