iOS 9.9.15.2 (build 19C56) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2021-12-13T18:27:43Z. The update package is 4.36 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: 0af122f8d8b7499785145dd5b1476ed2a4bf0683.zip.