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 790.39 MB. 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: 981a02976bb33b285d4a7ef27a41b7ae50dacb02.zip.