iOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPhone SE, released on 2019-04-29T17:36:16Z. The update package is 90.06 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f83942bb0a947c0d7104c1456a0ca226e746fff4.zip.