iOS 9.9.11.3 (build 15E216) is an official Apple over-the-air update for the iPhone 6, released on 2018-03-29T17:12:22Z. The update package is 1.67 GB. This is a delta (partial) update that requires 8.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b567cdcd1d512c34394e8b5897c73a0c9c77befe.zip.