iOS 9.9.15.1 (build 19B74) is an official Apple over-the-air update for the iPhone 8 Plus (Global), released on 2021-10-25T17:10:15Z. The update package is 4.35 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: efe672d877964e47014c25ed196f57784653ad8a.zip.