iOS 9.2.1 (build 13D15) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2016-01-19T17:59:44Z. The update package is 220.9 MB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 2747245f99922acb2653f1d072e84219bdf5faa3.zip.