A restart (soft reset) can resolve issues like continuous resetting/rebooting, device crashing, freezing, won’t ring or vibrate, can’t make or receive calls, device locks up, and keypad doesn’t respond.

Please visit following website and try it.

5s http://www.verizonwireless.com/support/knowledge-base-85249/

6s, 6s Plus http://www.verizonwireless.com/support/knowledge-base-178739/

iPad http://www.verizonwireless.com/support/knowledge-base-41053/