iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2015-10-21T17:15:56Z. The update package is 252.95 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: b14a84b074584259cffc28c24dc6e9d4b907c7bf.zip.