iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-03-29T17:08:48Z. The update package is 1.23 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: edfd2ba6b6ac625c48d6363c698cfbc10cb3e539.zip.