Call Waiting used to be a feature that you paid monthly for. As was Caller ID, Three Way Calling, Busy Number Redial, etc. It's amazing how much incumbent tel

Call Waiting used to be a feature that you paid monthly for. As was Caller ID, Three Way Calling, Busy Number Redial, etc. It's amazing how much incumbent telcos nickled and dimed little features like this. I think it was a couple bucks a month to have that feature.