watchOS 5.0 (build 16R5334f) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-07-30T17:10:09Z. The update package is 693.33 MB. This is a delta (partial) update that requires 4.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 03dba66bdf201c3185a42741760c6a079302a545.zip.