I have a question for other users of VOIP. Over the last couple of years, we've encountered several businesses/services that will not approve us or accept our orders because we use VOIP for our phone system. We've used it for ten years, but this problem has only shown up in the last 2 years. (We don't do any business at all on our cell phones; in our situation, they are mainly for emergencies. But some places don't accept those numbers either, because they are TracFones, and not some major telecom provider.) Has anyone else encountered this? Our phones work fine...