watchOS 5.0 (build 16R5340g) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-08-06T17:12:06Z. The update package is 371.57 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: 12f742d8f665a7dccf2a3d26e5c06cffa2e51c30.zip.