iOS 9.9.13.1 (build 17A5837a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-09-10T20:23:24Z. The update package is 2.93 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: 7e2a052b587d7a6169607cf06871c3dabe60268b.zip.