iOS 13.5 (build 17F5065a) is an official Apple over-the-air update for the iPhone 6s, released on 2020-05-06T17:09:06Z. The update package is 354.96 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: 6d9fdca260bee3d2f4cfae0b1855a5d1002af21a.zip.