Amidst the excitement for the finally-announced iPhone 4 on Verizon, here come some interesting news for owners of an iPhone 4 on AT&T willing to switch to Big Red: some cases for the non-CDMA iPhone won’t fit with the new unit. The Verizon iPhone has, in fact, relocated buttons that will make it impossible for some accessories to fit in properly. Namely, the mute switch and volume buttons have been relocated to a lower position to make room for the new antenna design at the top.

Should you worry and start thinking about signing petitions online for Apple to revise its position on the buttons? Not really. While Apple’s own Bumpers may have problems to work with the slightly new design, it’s likely that Apple has already teamed up with accessory makers to provide a variety of CDMA iPhone-compatible cases at launch on February 10. Plus, many cases have a larger opening for the aforementioned buttons than necessary – meaning that even in the new “location”, the cases will be just fine.

So, the Verizon iPhone’s volume buttons and mute switch are in a different position than before. This, however, should not affect most of the cases currently on the market, and we’re sure Apple will provide CDMA-ready solution come the official launch.