iOS 9.9.12.3.1 (build 16F203) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-05-24T17:59:54Z. The update package is 2.49 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: 6d993e621f826dcf9dacfb063d5940b73cc3630c.zip.