iOS 9.9.15.1 (build 19B74) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2021-10-25T17:10:31Z. The update package is 4.2 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: 244e900f3d3809e7a2cb5b83b9fd0b0e46a5c712.zip.