iOS 13.4.5 (build 17F5034c) is an official Apple over-the-air update for the iPhone 6s, released on 2020-03-31T17:20:26Z. The update package is 311.39 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 3b80c87af0c5aaa5d0a6e302a788988d471b7a0c.zip.