With the launch of the Verizon iPhone 4, Apple slightly tweaked the design of the device to make the iPhone 4 work on a CDMA network. This design change caused a slight downward shift of the iPhone 4 silent switch.
This concern immediately worried Verizon users, since most existing iPhone 4 cases would be incompatible. Soon after, rumors started circulating that Apple would redesign its iPhone 4 Bumper case to fit the Verizon iPhone 4. The video below proves just that!
The video showcases an updated iPhone 4 Bumper found at a USA Apple Store. As seen in the video, the silent switch cut-out is slightly more narrow and longer to fit the Verizon iPhone 4. However, this is the only real difference between the new Bumpers and the previous Bumpers.
This new iPhone 4 Bumper case is likely going to start showing up at Apple Stores worldwide, as it would not make sense to carry/manufacture two types of Bumper cases when one design works with all iPhone 4 devices.