iOS 9.9.15.3.1 (build 19D52) is an official Apple over-the-air update for the iPhone 12 Pro, released on 2022-02-10T18:14:53Z. The update package is 4.97 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: b8037ed88bb1dda05477ad7b5bd9daf6c537b151.zip.