iOS 13.1 (build 17A5821e) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-08-27T17:29:30Z. The update package is 367.58 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: 054ae60de71dd28ccd4b0dfea126aa9152d5bd98.zip.