watchOS 5.0 (build 16R5283r) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-06-11T17:07:08Z. The update package is 40.95 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: 46a0dfda959aba2f690585d5ddd5f74116cd8159.zip.