iPadOS 13.1 (build 17A5821e) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2019-08-27T17:27:52Z. The update package is 355.92 MB. This is a delta (partial) update that requires 13.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e61445f1d1f5c4c29efd2d585c5d5b77df22c24b.zip.