iPadOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2015-09-23T17:55:06Z. The update package is 181.42 MB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 736b4fdb3321c6d57f859cd2d93d7eb1634ec0a4.zip.