iPadOS 11.3 (build 15E216) is an official Apple over-the-air update for the iPad mini 2 (China), released on 2018-03-29T17:06:31Z. The update package is 583.67 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fc92f6bd57f25bc1013db660120e66453339c009.zip.