iPadOS 12.3 (build 16F5155a) is an official Apple over-the-air update for the iPad mini 5 (Cellular), released on 2019-05-07T17:03:30Z. The update package is 80.07 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b3ed90aa4d12a78f1e8664e96efd4988561d27cb.zip.