iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini (WiFi), released on 2015-10-21T17:15:49Z. The update package is 19.68 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: 672e94a4f05fba38d8c12df794ffeda08299b444.zip.