iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad 3 (CDMA), released on 2015-10-21T17:15:51Z. The update package is 189.55 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0464f4fa62b562723de894a70e9a500afe1a398e.zip.