iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad 3 (GSM), released on 2015-06-30T15:51:10Z. The update package is 323.21 MB. This is a delta (partial) update that requires 8.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a45d13f29dd8cedf1fceff7b22613065371ec3f9.zip.