iOS 13.3 (build 17C5046a) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-11-20T18:04:28Z. The update package is 124.19 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: 3d0a6c13dd51083c15d771a0a296b0b7eeb0f5bd.zip.