iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2018-03-29T17:08:06Z. The update package is 607.94 MB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b2bbe3cd2b86477e4f354e716b201820d5de1fde.zip.