watchOS 4.1 (build 15R846) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-10-20T17:05:30Z. The update package is 606.63 MB. This is a delta (partial) update that requires 3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e5c5e441f4558bade701c31f7e9385e19c028793.zip.