iPadOS 9.1 (build 13B143) is an official Apple over-the-air update for the iPad 3 (GSM), released on 2015-10-21T17:15:52Z. The update package is 895.41 MB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1a1ad8317e0a931b25a07ee1c5d942a04f328744.zip.