iOS 11.2.5 (build 15D5057a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-01-11T18:03:17Z. The update package is 134.5 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6318e902b42b85edaa52a5c90fe39a14dd26f2b5.zip.