iOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPhone X (Global), released on 2019-04-08T17:04:57Z. The update package is 317.76 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: b7fb7719df2ae9185e72f0c7dd55ba5076ca0f1b.zip.