iOS 12.1.3 (build 16D5039a) is an official Apple over-the-air update for the iPhone SE, released on 2019-01-10T18:09:13Z. The update package is 226.83 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: e8f8e207a2a258961e4255040a5908d4cc8ae4a2.zip.