But you can't guarantee that you can wipe it. What if it's not connected to the 3G network? What if the data has already been pulled off? What if it's been copied to a memory card on the phone? What if the phone doesn't properly implement this feature?
If you're using a Blackberry then you encrypt the entire device. The entire memory is encrypted with the device password and a wipe is triggered from too many incorrect passwords.
I don't know if the Exchange devices do the same thing - our company requires this kind of security, so we still only allow Blackberry.
