iOS 13.0 (build 17A5522g) is an official Apple over-the-air update for the iPhone 6s, released on 2019-07-08T20:10:52Z. The update package is 916.05 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: d3d254bd3316dcd35f39ad8a0cf7aa2d2de9161b.zip.