iOS 9.9.15.2.1 (build 19C63) is an official Apple over-the-air update for the iPhone 13 Pro Max, released on 2022-01-12T18:07:46Z. The update package is 4.91 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: 526641e7583fdb4031ed2ba55b9d6f246ad484b2.zip.