iPadOS 8.3 (build 12F69) is an official Apple over-the-air update for the iPad 3 (CDMA), released on 2015-04-08T17:56:07Z. The update package is 645.7 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 052aa0874ffecb3e64ca89ebedc8610f58691ca5.zip.