iPadOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2017-12-13T18:08:50Z. The update package is 1.05 GB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0ab00886925660a5e7a91df32558717af31d19ef.zip.