iOS 7.1.2 (build 11D257) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2014-06-30T18:00:04Z. The update package is 269.77 MB. This is a delta (partial) update that requires 7.0.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 703d74c44bb99128b18df12ebf6bba3fddd973fb.zip.