iOS 10.2.1 (build 14D15) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2016-12-20T18:02:30Z. The update package is 34.64 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: 7d9f6a2b8c8b900ba2c286f7d1ea2ed242944456.zip.