iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2019-01-22T18:06:32Z. The update package is 1.29 GB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31da6a80f5890a5ee7fd07df1dcd776e01712d07.zip.