iPadOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-06-30T15:51:12Z. The update package is 164.29 MB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c3154dd230c9ebc8e88db3c44e859bdbab75f72b.zip.