iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2015-09-16T18:02:12Z. The update package is 1.14 GB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4d29b33e8e5b8cbf0ed1cdf9bf5a21ed083a6219.zip.