iOS 9.9.15.4 (build 19E6241) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2022-03-14T17:13:12Z. 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: 0309134e4b497110887338e0c76df44e847576af.zip.