tvOS 11.3 (build 15L5175d) is an official Apple over-the-air update for the Apple TV 4 (2015), released on 2018-02-07T18:05:34Z. The update package is 1.17 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3265c741ee0a29a8faa0ad7494846531c7471f20.zip.