audioOS 9.9.16.3.1 (build 20K661) is an official Apple over-the-air update for the HomePod mini, released on 2023-02-06T18:20:09Z. The update package is 277.44 MB. This is a delta (partial) update that requires 16.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6f3478e2fc7ca4cdb944b28e99af421be414fcba.zip.