tvOS 10.1.1 (build 14U712a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2017-01-23T18:30:06Z. The update package is 145.2 MB. This is a delta (partial) update that requires 10.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a778c411d329c6e253a40240f5f4f07c96ec8d76.zip.