iOS 7.0 (build 11A4449d) is an official Apple over-the-air update for the iPhone 4 (CDMA). The update package is 102.25 MB. This is a delta (partial) update that requires 7.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 35f4d58e49dca2dd6beadd892991e9600844b7cb.zip.