iPadOS 8.4 (build 12H4125a) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-06-09T17:53:03Z. The update package is 133.96 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: 904a350c62031e4fd1b012699d63147b1ed987e7.zip.