iPadOS 9.9.15.1 (build 19B74) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2021-10-25T17:10:10Z. The update package is 3.73 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: 36504629687653e3c7af6d29c7a3d2963bade5f9.zip.