iOS 11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-01-23T18:29:40Z. The update package is 1.09 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9951dc8a429d02b1b234d3ce6716cb93c42f2bfb.zip.