iPadOS 9.1 (build 13B5143) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2015-10-21T17:15:46Z. The update package is 1.33 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: 5c9d04b1b4f027e4b27d1b642244d94856b75eb5.zip.