iPadOS 12.1.3 (build 16D5037a) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2019-01-07T18:06:36Z. The update package is 224.51 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 784b9eb4a6411d7017a1c6fbcddf48d69c4eee20.zip.