iOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2015-03-09T18:49:05Z. The update package is 454.32 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8d72e1952cb9bd854b81b1f5613bb1b1ab821c36.zip.