iPadOS 8.4 (build 12H4098c) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-05-11T17:46:04Z. The update package is 115.34 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: e2d0b9134bfbc926f9a49f4e95f9a461244fd18b.zip.