iOS 9.9.13.1 (build 17A844) is an official Apple over-the-air update for the iPhone 7 (GSM), released on 2019-09-24T17:11:38Z. The update package is 2.74 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: d0d19e50ce8c4a23112403fb94d2742f2ec6b8d8.zip.