iOS 13.3 (build 17C5038a) is an official Apple over-the-air update for the iPhone X (GSM), released on 2019-11-12T18:12:59Z. The update package is 273.32 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9399043038e441fc220bc5179a1f1e52af52f453.zip.