iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini (GSM), released on 2015-10-21T17:15:50Z. The update package is 881.55 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 251cfb704cd67e324fdd53ddce9b554f1c3623cf.zip.