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 257.56 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b3261e6f16f5b7275790f0c16530b1054dbd0d4a.zip.