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 511.05 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fb9f1bf166b66afec87af74e5e143bfce32892ab.zip.