iPadOS 9.9.10.2.1 (build 14D27) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2017-01-23T18:07:12Z. The update package is 1.15 GB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: efb42aec56763f1c9221a7955e874a50991e1bb4.zip.