iPadOS 9.1 (build 13B5130b) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2015-09-30T17:58:09Z. The update package is 1.33 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d196025e24466cc65e3aaa6f18e5e829aa28b1f4.zip.