iOS 9.9.11.1 (build 15B93) is an official Apple over-the-air update for the iPhone 6s, released on 2017-10-23T17:07:27Z. The update package is 1.42 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 29009c90a679947a7b2e15fa2b040eda5ddb681d.zip.