iOS 9.9.17.0 (build 21A6331) is an official Apple over-the-air update for the iPhone 15 Plus, released on 2023-09-18T17:32:51Z. The update package is 5.88 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: c5c61d0d3bafe956b278bd9807558a8efe68a7fd.zip.