tvOS 10.2.1 (build 14W5563b) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2017-03-28T16:57:57Z. The update package is 36.09 MB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f90c619381cba6df325958f49d8a4d31844df1c0.zip.