iOS 13.3 (build 17C5046a) is an official Apple over-the-air update for the iPhone 6s, released on 2019-11-20T18:04:25Z. The update package is 333.39 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: 641ac6416769b7ceb151ea63d795e06b7b878f16.zip.