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 1.02 GB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 16cfaa9e6b67b0b93227a28cc7cd3ad5d1958e2f.zip.