iPadOS 11.1.1 (build 15B150) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2017-11-09T18:05:58Z. The update package is 1.08 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 387144f508b33532717ee430a2fa7612acfa0645.zip.