iPadOS 11.4 (build 15F5061d) is an official Apple over-the-air update for the iPad 5 (Cellular), released on 2018-05-01T17:05:49Z. The update package is 257.25 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: af9742682ade11aa6c0d29ca164a5254cec9b1fa.zip.