watchOS 5.0 (build 16R5360a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-08-24T17:14:15Z. The update package is 297.22 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: fd3794c8207f92e61caf7a3f39a66937acadabf8.zip.