I picked up a Rezound 5 days ago, and purchased the extended battery at the same time. I am coming from a Droid X, and I was hoping that the extended battery would give me approximately the same battery life as the standard battery on the Droid X. For anyone else who is contemplating, let me disabuse you of that thought right now. It does not. In addition, the extended battery changes the size and the feel of the phone, more than I expected. I have gone back and forth with the standard versus extended battery. With the extended battery, it is harder for me to hold the phone one handed and operate it with my thumb. And I have fairly large hands. Be sure to try the phone WITH the extended battery, before you commit. The difference in speed, not only the 4g network, but simply moving around through menus, etc, is more than I expected. This is an upgrade, and I will not be going back to the Droid X. I am having some problems with the HTC interface, versus the Motorola interface that I am accustomed to. In the received calls listing, I cannot find information about the length of the calls. This is important, I need that. Is there anyway to get it?