First major problem happened yesterday; after completing a phone call, I wanted to press the 'END' button but the screen never came back on. I moved the phone to various angles but no screen illumination. Pressing the four bottom or the camera button made no difference. Pressing and/or holding the power button only caused the four function buttons to light up for about 1 second. I was set to return the unit to the Verizon store when I remembered something I read on this forum about removing the battery. I did that and after replacing it I was able to get it to go through a power up sequence. It worked fine the rest of the day. Anyone else have this problem?