iOS 9.9.15.0 (build 19A6346) is an official Apple over-the-air update for the iPhone 13, released on 2021-09-20T17:13:15Z. The update package is 4.94 GB. This is a full OTA update that can be applied from any compatible base version. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: c583f6ce0aa828eab91afe5ade8ea324f348be03.zip.