iOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone SE, released on 2019-04-22T17:09:01Z. The update package is 292.46 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: f9938ea68cc79f8fa0bc4a34eb968a4628f6c24f.zip.