Nope, It fits in the case so snug that there is no movement.
Very bad. With no movement, there is nothing to absorb the shock of an impact. 100% of that energy is transmitted into the phone. And, because the case adds significant weight (doubling the weight of the phone, I guess) that energy will be well beyond what the phone was designed to withstand.
An even worse problem came to mind as I thought about this over the day: in a drop impact, sharp corners tend to focus the shock energy of the impact. It's not that there's any more energy; of course there is not. But, that energy is concentrated on a small area. Round corners, such as the iPhone itself has, tend to distribute or diffuse the impact energy. It's not that there is any less energy; of course not. But, that energy is spread around so no one point experiences it all. This is one reason why many hand-held devices have rounded corners.
These metal cases take the iPhone's energy-diffusing rounded corners and square them up into energy-focusing sharp corners. Oh, it's very bad; you have just undone a very significant protective feature of the iPhone's design.
Now, these cases are not without merit. It depends on what you see as the threat to your phone. If you're not concerned about dropping but are concerned about crushing, then these cases will be excellent for you.
I'm also concerned about the possibility that any of these cases will trap moisture leading possibily to corrosion inside the phone. Anything which sort of encapsulates the phone and restricts free airflow around the phone could do this.
mrmaigo said:
too bad 3G iPhones overheat
My 3G gets only slightly warm. No overheating noticed at all. And I have no concern about any of these cases from a heat standpoint.
Sorry to be more than a bit negative about the EXOvault case, but the engineer in me just comes out at times.