iOS 9.9.15.7.3 (build 19H6307) is an official Apple over-the-air update for the iPhone 6s, released on 2023-01-23T18:47:06Z. The update package is 3.81 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: 16e228802b9423f0bdd0e94f5b533afce87a42fc.zip.