iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-10-21T17:15:58Z. The update package is 240.89 MB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 273c3614bf885b5072a83a0d0fabb8094832905b.zip.