iOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPhone SE, released on 2019-05-07T17:04:29Z. The update package is 64.52 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: 137a0d0bd014e74c08036540decd7d2460767acd.zip.