iPadOS 9.1 (build 13B5130b) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2015-09-30T17:58:09Z. The update package is 1.33 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: b705060855732a16a7e74824a3c6af876abd740e.zip.