question

I've almost given up trying to make a call through the RingCentral system because the people on the other end of the call have a difficult time hearing me. They report they only hear about 1/2 of what I'm saying and I end up calling on my personal line and *67'ing. I and other people in my business are using our own cellphones and they report problems as well. This occurs if they call me and I pick up and when I call through RingCentral.