iPadOS 8.2 (build 12D508) is an official Apple over-the-air update for the iPad 3 (GSM), released on 2015-03-09T18:49:03Z. The update package is 279.02 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: 855fc969bf761b3cda35bcaee75a8afb2d93c1fb.zip.