iOS 9.9.10.3 (build 14E277) is an official Apple over-the-air update for the iPhone 6+, released on 2017-03-27T16:58:05Z. The update package is 1.3 GB. This is a delta (partial) update that requires 9.3.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f544775783460a89299f7c22d8f7ab90f733f403.zip.