iPadOS 8.4 (build 12H4086d) is an official Apple over-the-air update for the iPad 3 (GSM), released on 2015-04-27T17:47:04Z. The update package is 119.05 MB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: edc8bf9b2d323f73c2d934f4ad2a1679c1d2ff21.zip.