iOS 7.1 (build 11D5127c) is an official Apple over-the-air update for the iPhone 4 (GSM / 2012), released on 2014-01-07T17:54:16Z. The update package is 71.86 MB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 066a7e35326abff3cd699d3b2169a518974aac58.zip.