iOS 13.0 (build 17A5565b) is an official Apple over-the-air update for the iPhone 6s, released on 2019-08-15T17:08:13Z. The update package is 202.27 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: 94c4925ebacf9f9f950f8f08581514c8e93bdb47.zip.