iOS 8.0 (build 12A365) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2014-09-17T17:54:04Z. The update package is 1.86 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5da9a66588696e00110755a8772210b03bca301a.zip.