iPadOS 9.1 (build 13B5136) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-10-06T17:54:04Z. The update package is 1.32 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6279965f18aa0e58151bf25b67c6c0832d2212a2.zip.