iPadOS 9.9.11.3.1 (build 15E6302) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2018-04-24T17:04:11Z. The update package is 1.74 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4cc2ada9cedf9ed8643ed6b8b8d6a354a4e0f4fc.zip.