Full details at http://www.apple.com/iphone/case-program/
Follow these steps to apply for a Bumper or case.
- Download the iPhone 4 Case Program app from the App Store.
- Launch the app on your iPhone 4 and sign in using your iTunes Store account or Apple ID.
- Select your Bumper or case.
For iPhone 4 purchases made before July 23, 2010, you must apply no later than August 22, 2010; otherwise, you must apply within 30 days of your iPhone 4 purchase. To qualify for this program, you must purchase your iPhone 4 by September 30, 2010.