tvOS 9.2.1 (build 13Y768) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2016-04-27T16:59:53Z. The update package is 25.32 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 502629bb8b2fbfbc487b7ad15d1c754339ef360f.zip.