watchOS 3.1.1 (build 14S5875b) is an official Apple over-the-air update for the Apple Watch Series 1 (38mm), released on 2016-11-15T21:08:33Z. The update package is 143.43 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: 5066a5d5ed9cf55d706445b56bbd7736a195b611.zip.