iPadOS 11.3 (build 15E5211a) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2018-03-12T17:05:28Z. The update package is 219.16 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e9cde03bec1c53b5fb08e34ca6ebab1f781766b7.zip.