watchOS 5.0 (build 16R5283q) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-06-05T09:53:04Z. The update package is 622.16 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: 33b9fd86bdd95689d0a78c2fc5ca861737b6d282.zip.