iOS 9.9.13.1 (build 17A5831c) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-09-04T17:06:14Z. The update package is 2.89 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cbdbff5ee958098026d0c795ca546d51f03412c2.zip.