iPadOS 12.1.3 (build 16D39) is an official Apple over-the-air update for the iPad 6 (WiFi), released on 2019-01-22T18:08:19Z. The update package is 1.27 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 58b8d7e3a7c0a211d0ea3ce7eac6f6aaf96cb8ce.zip.