iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad 3 (WiFi), released on 2015-10-21T17:15:51Z. The update package is 975.21 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c77cbf9e26caed5a68fbb928b7fa1b291dc73353.zip.