iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-10-21T17:15:57Z. The update package is 1.05 GB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2d1b9cb64a010cdf67dd578e42d1bcaa72140daf.zip.