iOS 9.9.11.3 (build 15E216) is an official Apple over-the-air update for the iPhone 6+, released on 2018-03-29T17:12:15Z. The update package is 1.59 GB. This is a delta (partial) update that requires 9.3.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 188d1ceb1778e78d6abdea3499765bf3dff2a95a.zip.