iPadOS 10.3.3 (build 14G5053a) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2017-06-22T17:24:34Z. The update package is 59.12 MB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b1adbfcb38a06cd56cc2d2c13fdede7b7447e3dc.zip.