iOS 13.0 (build 17A5534f) is an official Apple over-the-air update for the iPhone 6s, released on 2019-07-17T17:35:19Z. The update package is 488.69 MB. This is a delta (partial) update that requires 13.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 56aa264e4d564aaf58dbfce10c4d37ca00889952.zip.