iOS 13.1 (build 17A5821e) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-08-27T17:29:31Z. The update package is 367.42 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: cd12be5309cd036a268b7a207602a9e11ff21649.zip.