iOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPhone SE, released on 2018-12-19T18:07:07Z. The update package is 229.99 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 975739bbbbf1c6ce486ec9f814f4fad99961d7ce.zip.