iOS 11.3 (build 15E5201e) is an official Apple over-the-air update for the iPhone X (GSM), released on 2018-03-05T18:14:00Z. The update package is 363.39 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8dcfc8d67d34d00680b58829b248ea7ed8d210c1.zip.