iOS 9.9.15.3.1 (build 19D52) is an official Apple over-the-air update for the iPhone 13, released on 2022-02-10T18:14:54Z. The update package is 4.83 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: bf2d34a8c6164ae8ecab214853e4c89c652210ca.zip.