iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2017-12-13T18:06:57Z. The update package is 1.1 GB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 295e12bc7bd66226a943c19cc02825e16e8b9234.zip.