watchOS 5.0 (build 16R5360a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-08-24T17:14:09Z. The update package is 665.66 MB. This is a delta (partial) update that requires 4.2.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1120df0ce8b1f017c198d05fd28744ef175841e1.zip.