iOS 9.9.12.0 (build 16A5308e) is an official Apple over-the-air update for the iPhone 6s, released on 2018-06-19T17:04:57Z. The update package is 2.09 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: 0df4a184e0f2b5e612b192a99623487ea05768d3.zip.