iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad mini 2 (WiFi), released on 2015-10-21T17:15:55Z. The update package is 235.51 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: e0f90307a98e927eac028d27a3362a62adc9d865.zip.