Unless there is a setting for it, you no longer have quick access to hop back to the phone app, while on a call, if you've minimized the call and are multitasking in other areas of the phone (looking something up on line, looking in the gallery, using the calculator, email, etc). A picture of the person you're talking to was in the upper left corner, along the a timer. To get back to the dialer, you simply tapped on the stamp size picture of the person you were speaking to. Now you have to (1) make your way back to the home screen, (2) tap the phone icon and (3) tap on go back to the dialer. Why on earth would they do that?