iOS 13.6 (build 17G5045c) is an official Apple over-the-air update for the iPhone 6s, released on 2020-06-09T17:28:27Z. The update package is 147.24 MB. This is a delta (partial) update that requires 13.5.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 197a50a0b91d56730956887dedec51fb2883561d.zip.