watchOS 3.1.3 (build 14S960) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-01-23T18:02:27Z. The update package is 144.71 MB. This is a delta (partial) update that requires 3.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0b58082e5f03d73069932b11443927ad203770fd.zip.