iOS 7.1 (build 11D167) is an official Apple over-the-air update for the iPhone 4 (CDMA), released on 2014-03-10T16:58:41Z. The update package is 151.31 MB. This is a delta (partial) update that requires 7.0.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4378f735469a562a3b4f8d4d4209febdbf2c2c9d.zip.