watchOS 5.0 (build 16R5363a) is an official Apple over-the-air update for the Apple Watch Series 3 (42mm, LTE), released on 2018-08-31T17:15:33Z. The update package is 295.67 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: 3b1a5001fdab80c84f23f2c9accd041b374364b0.zip.