iOS 9.9.16.3.1 (build 20D67) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2023-02-13T18:24:49Z. The update package is 4.86 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: 6800da3e60e76acac351ce113218abb9bfb97019.zip.