Apple has posted details of its iPhone 4 case program. According to the webpage, iPhone 4 users who want to receive a free case need to download the free iPhone 4 Case Program app from the App Store. Once the app is installed, users need to login with their iTunes Store account or Apple ID. The app itself checks IMEI and serial number to verify that the user indeed does own an iPhone 4, and lets the user choose an iPhone 4 Bumper or other case. Appleā¦