I have a problem that while I'm on a call my cheek keeps hitting the touch screen and it ether turns on the speaker phone or it dials numbers. I know the screen is supposed to go blank when up against the my ear but it's not. Is there a way to increase the sensitivity of the sensor. I know my son who works for Verizon says I need to hold it tight against my ear but with hearing aids it a little painful to mash it against my ear. Any suggestions would be greatly appreciated. Thanks