iOS 7.1 (build 11D167) is an official Apple over-the-air update for the iPhone 4 (CDMA), released on 2014-03-10T16:58:42Z. The update package is 1.11 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 28899065515b0e7de065d7d15ea4e83d72040631.zip.