iPadOS 9.1 (build 13B5119e) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2015-09-23T17:55:06Z. The update package is 1.42 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: ef28d83e0a2a6d8f7dcdeade1bbeb413d93ad3cc.zip.