iPadOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad mini 4 (WiFi), released on 2017-11-09T18:06:37Z. The update package is 1.02 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 82dcece1e3499d84950048161f4dfa83cb786023.zip.