iOS 9.9.11.1.2 (build 15B202) is an official Apple over-the-air update for the iPhone 6s, released on 2017-11-16T21:21:41Z. The update package is 1.32 GB. This is a delta (partial) update that requires 9.3.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 74c6f7b7f77d9cf9c41d530a2f452ecfcc079197.zip.