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 151.33 MB. This is a delta (partial) update that requires 7.0.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 19f0d33a4f2ad8cb769b4bd3355669e45e6317da.zip.