watchOS 4.1 (build 15R5846) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-10-20T17:04:04Z. The update package is 328.29 MB. This is a delta (partial) update that requires 4.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1716f7066a386fb0e39fbe5bb1b47727f0d7b9b2.zip.