iOS 9.9.15.0 (build 19A6346) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2021-09-20T17:13:09Z. The update package is 4.95 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: 15a99b454bad8b6fe6e21b046f0a61c9bb28d0be.zip.