iPadOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2017-11-09T18:06:58Z. The update package is 163.62 MB. This is a delta (partial) update that requires 11.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d661d468054655fd8d381e01efc619907ed3838d.zip.