tvOS 11.2.5 (build 15K5544a) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-01-03T21:06:21Z. The update package is 125.39 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: 9b64ba038e1ce0940fd4c4a7ab1e0fba52aedd1c.zip.