iPadOS 10.3 (build 14E277) is an official Apple over-the-air update for the iPad mini 3 (China), released on 2017-03-27T16:57:12Z. The update package is 564.32 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 020a646fe250d0bea85bbe815e6a40a8141d0117.zip.