iOS 9.9.11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6+, released on 2018-02-19T21:14:02Z. The update package is 1.42 GB. This is a delta (partial) update that requires 9.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0575b4d92138c5da466b5e542450f98504ee3607.zip.