iOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2015-03-09T18:49:05Z. The update package is 346.92 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 183b9bf31f27e69d188978c16707a3e5a7a73d7c.zip.