iOS 7.1 (build 11D5115d) is an official Apple over-the-air update for the iPhone 4 (CDMA), released on 2013-12-13T18:21:08Z. The update package is 69.71 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: 50f3c19de69fb3fd38c5393fba2146fbe25ebc4f.zip.