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 277.57 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d8c5c05e898d8bb7c56065de7f75838233c5d2f8.zip.