iOS 9.9.15.4.1 (build 19E258) is an official Apple over-the-air update for the iPhone 13, released on 2022-03-31T17:14:46Z. The update package is 4.82 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: e3a0a240d8a22856f56c00c362a33275dd9269ca.zip.