Back button on Android Phones
<p>A couple questions about the back button (as seen on the emulator)...</p>

<p>1) Do all Android phones have the back button as a hard, tactile button?</p>

<p>2) If so, is it still recommended to put a back button in your software?</p>

<p>3) Is it possible to change the animation between activities when this back button is pressed? I would like it to be consistent with the animations in my app.</p>
