watchOS 6.1 (build 17S5083a) is an official Apple over-the-air update for the Apple Watch Series 3 (38mm, LTE), released on 2019-10-23T17:10:54Z. The update package is 659.8 MB. This is a delta (partial) update that requires 6.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0f2f3d9c4af642a558f3bbc644fb193c86783db3.zip.