iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2017-01-12T21:11:58Z. The update package is 21.96 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: a3456e264d42c49fadf45d9605cd390213c01130.zip.