iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2017-01-23T18:07:56Z. The update package is 874.25 MB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 88a37aaf91faec6d5239f4b9ebfbc223683f4bb1.zip.