iOS 9.9.13.5.1 (build 17F6080) is an official Apple over-the-air update for the iPhone 6s+, released on 2020-06-01T17:10:25Z. The update package is 2.92 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: 3052220ec0e13db0353b569655ae3f855365abec.zip.