tvOS 10.2.1 (build 14W5573a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2017-04-10T17:08:29Z. The update package is 30.97 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: 74d363f9c5739e162d12b5725b8562bde57cb87d.zip.