iPadOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPad mini 3 (Cellular), released on 2019-05-10T17:08:26Z. The update package is 370.62 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: cd36d5460adbe7efaccd685b0c9930e8ca9e0abd.zip.