iOS 13.3 (build 17C5046a) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2019-11-20T18:04:15Z. The update package is 149.58 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: d3681e56a859197e6c7897fa99cae5ba8e8a8c0d.zip.