iOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPhone X (Global), released on 2019-05-10T17:09:22Z. The update package is 451.46 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9dde3932045bb6affd59737e4e9f619a848f2caf.zip.