iOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPhone 6+, released on 2016-01-19T18:20:40Z. The update package is 38.12 MB. This is a delta (partial) update that requires 9.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: da0033bc1d92eb4e8b8b1b711a4cbbab3e27a471.zip.