iOS 9.9.12.1 (build 16B5089b) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2018-10-22T17:01:56Z. The update package is 2.42 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: aba0e3cd7d944d911999fed0af80f5c77d6dfdbd.zip.