iOS 9.9.10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6+, released on 2017-03-27T16:58:04Z. The update package is 1.65 GB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f260b255a7518c4f4429a9d673d263458f305a82.zip.