iOS 10.2.1 (build 14D23) is an official Apple over-the-air update for the iPhone 5 (Global), released on 2017-01-09T17:55:53Z. The update package is 32.94 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a56d3774a1c38eb7c4be945d446b5bd2dcd70c70.zip.