iOS 9.2.1 (build 13D14) is an official Apple over-the-air update for the iPhone 6+, released on 2016-01-04T17:58:50Z. The update package is 33.99 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b10aca5680d076ac38bf0f186efd3067ded8e332.zip.