iPadOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2015-09-23T17:55:06Z. The update package is 180.07 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: a45b6404284b667b0648600db76657499f6c794a.zip.