audioOS 9.9.15.3 (build 19K6547) is an official Apple over-the-air update for the HomePod (Unknown Model), released on 2022-01-26T18:16:41Z. The update package is 1.88 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: 3b029fa9457e3630844c9db6d5952a929d055ee3.zip.