iOS 9.9.15.1.1 (build 19B6081) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2021-11-17T18:12:39Z. The update package is 4.89 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: 8012f0283bce143361cbc9a04f21dce73b228d2d.zip.