watchOS 5.0 (build 16R5349a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm), released on 2018-08-13T17:07:04Z. The update package is 277.84 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: fa6f75adf39fef56d40083114037aedd91056552.zip.