tvOS 11.2.5 (build 15K5549a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-01-12T18:02:12Z. The update package is 19.69 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2e1a153205a3c1f4f7ee2f1fc7f60abed4d90ebb.zip.