iOS 13.1 (build 17A5837a) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-09-10T20:27:21Z. The update package is 217.95 MB. This is a delta (partial) update that requires 13.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 547cabf57ca99f0db24c792073925b9199cd7de0.zip.