As promised, Apple has launched iPhone 4 Case program to give away free cases to customers. Do note that the free Bumper aka case will be given only to those customers who purchase iPhone 4 before September 30.

The customers who will buy iPhone 4 before September 30 would be eligible for free iPhone 4 Bumper. After buying the phone, users will have to download the iPhone 4 Case Program app from the App store. You need to sign in with iTunes Store ID or Apple ID to select the Bumper of your choice and then order it.

The app reads – if you’re experiencing iPhone 4 reception issues, then you’re eligible to receive an iPhone 4 Bumper or other select third-party case from Apple at no charge. However, those who’ve purchased iPhone 4 before July 23 must apply before August 22 or within 30 days of the purchase.