watchOS 4.1 (build 15R5835d) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2017-10-09T17:05:00Z. The update package is 81.04 MB. This is a delta (partial) update that requires 4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6b2e22c743885b38c5f9e1f0adfaa6c6765aea32.zip.