iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone X (GSM), released on 2019-07-16T17:39:33Z. The update package is 335.87 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: d35af530c90b9537d03da386d80888fd8fdb7017.zip.