On about 10% of my calls, I find I can't adjust the call volume; the buttons are ignored. When it gets into this state, pressing any other buttons other than Hangup seems to be disabled as well. I exchanged my phone for another in an attempt to fix this, but the new one has the same problem.
Is anyone else having this problem? How can I get this problem fixed? I don't want to keep exchanging the phone for another that has the same problem again. I can't demonstrate the problem for the verizon tech as it doesn't always behave this way.