iOS 7.0.3 (build 11B511) is an official Apple over-the-air update for the iPhone 4 (GSM), released on 2013-10-22T19:59:16Z. The update package is 50.85 MB. This is a delta (partial) update that requires 7.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f503b9fac99d89dd2529fa4e706a72c07b1aa675.zip.