iOS 13.3 (build 17C5053a) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2019-12-05T21:11:25Z. The update package is 430.71 MB. This is a delta (partial) update that requires 13.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 12dc4d2999b118fadbd53ea8380535ec42f3c4f2.zip.