iPadOS 8.3 (build 12F69) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-04-08T17:56:07Z. The update package is 319.6 MB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: be0dde9704f345b49a7737c4d70643c6de0aadc5.zip.