iPadOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPad mini 2 (Cellular), released on 2018-03-05T18:13:51Z. The update package is 259.48 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: d58138cceaa4ef94b3f93ccb85e09e20337ae5ee.zip.