iOS 9.9.11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-01-23T18:29:32Z. The update package is 1.5 GB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cb81e48ec701533f50447f39f47fbd9d7ca63c54.zip.