Why is my HTC One S have multiple system crashes a day while trying to make a call?

[AC Question]

The last two days every time i try to call out or receive a call, the screen freezes, then a notification says I had a system crash, now it's multiple system crashes a day while trying to make a call, I've rebooted, did a factory reset, every time I try again, it's the same thing, please help, thanks, Angela Foster

 

[B. Diddy]

Welcome to Android Central! Try booting into Safe Mode, which temporarily disables all 3rd party apps. https://support.t-mobile.com/docs/DOC-14146. If the problem disappears in Safe Mode, then something you installed is causing the problem. You may have to uninstall apps one by one until the problem disappears. If the problem persists in Safe Mode, then it's more likely to be a hardware or firmware problem.