Hi, I am new to the android world with the purchase of my Kyocera event. I liked it so much that I talked my hubby into getting one as well. His has a problem though. As soon as he is connected to a call the screen locks up and he cannot end the call. The screen goes black. Pressing the right side wake up button only flashes the screen for 1 second and does not show the "end call" button. He has to turn off the phone to end the call. Not good. Any suggestions? Thank you in advance.