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 35.4 MB. This is a delta (partial) update that requires 12.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c0bd4c9bc7936789c6f1bde9c3debbfd86cad851.zip.