iOS 13.3 (build 17C5032d) is an official Apple over-the-air update for the iPhone 6s, released on 2019-11-05T18:14:16Z. The update package is 318.5 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: 87ae672c682caa75e710c0f72e27cea4b410a0d5.zip.