iOS 9.9.15.4.1 (build 19E6258) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2022-03-31T17:14:08Z. The update package is 4.26 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: 38b772d73196f0a3383ac404892bf165622bb95d.zip.