iOS 7.1 (build 11D5127c) is an official Apple over-the-air update for the iPhone 4 (GSM), released on 2014-01-07T17:54:14Z. The update package is 71.73 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: f9ec9102486a0380abc86aacaeffd6ebe4ea545d.zip.