iPadOS 13.4 (build 17E5223h) is an official Apple over-the-air update for the iPad mini 4 (Cellular), released on 2020-02-05T18:16:53Z. The update package is 704.8 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 56af1365c1858932d75b2b369575e3cca23bab3c.zip.