iPadOS 11.3.1 (build 15E302) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2018-04-24T17:06:02Z. The update package is 1.24 GB. This is a delta (partial) update that requires 10.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cb47654ae7449f95938f96a9c3c75b734d68b0cd.zip.