iOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPhone 4s, released on 2015-03-09T18:49:04Z. The update package is 1.1 GB. This is a delta (partial) update that requires 7.0.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 08515287265f8ff1731f6a28055da05f400ab542.zip.