iOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPhone SE, released on 2019-04-08T17:05:15Z. The update package is 299.21 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: bfec65aa1fb5aa0ff6e0463b846c5991d59e2b46.zip.