watchOS 5.0.1 (build 16R6381) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2018-09-27T20:09:08Z. The update package is 605.33 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: e45b19f90ff90e8519030a6ce2ffe941c2ba6f5b.zip.