watchOS 6.1.1 (build 17S5433b) is an official Apple over-the-air update for the Apple Watch Series 4 (44mm, LTE), released on 2019-11-05T18:18:34Z. The update package is 754.71 MB. This is a delta (partial) update that requires 5.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ef0c9dbaba51a5823558cd588e3ecc594114e767.zip.