iPadOS 9.1 (build 13B5137) is an official Apple over-the-air update for the iPad Air 2 (WiFi), released on 2015-10-12T16:57:00Z. The update package is 1.33 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6f7ca90a9903d085e8ef1de3b0cf6976d63a039d.zip.