iOS 9.9.11.1.1 (build 15B150) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-11-09T18:09:19Z. The update package is 1.54 GB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b420a4d94cfca58c35193d110a713837e0505806.zip.