iOS 7.1 (build 11D169) is an official Apple over-the-air update for the iPhone 4 (GSM), released on 2014-03-10T16:58:58Z. The update package is 152.05 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: fbfc2b0a7d0ba1195c328bc950ece43af34c71e2.zip.