iPadOS 9.9.10.2.1 (build 14D27) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2017-01-23T18:07:15Z. The update package is 1.12 GB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b8a7a87fdd26fd7018b964e8652f9e2c1d6218ae.zip.