tvOS 10.2.1 (build 14W5583a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2017-04-24T16:54:01Z. The update package is 19.89 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b78d6b0047b586e28b03e9901c96d5c1fd0498e.zip.