iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad mini 3 (WiFi), released on 2017-12-13T18:06:13Z. The update package is 355.53 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f2c0d5f07f468495cc80e92fb35b73c1c1e4ec19.zip.