audioOS 9.9.15.3 (build 19K547) is an official Apple over-the-air update for the HomePod mini, released on 2022-01-26T18:16:57Z. The update package is 952.75 MB. This is a delta (partial) update that requires 14.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a3b0d4f11f734f661cca68e359b30f5b18dd53bf.zip.