I suppose there is no such thing as truth in advertising anymore - at least for some companies.  I went through hell a few months ago changing to Earthlink's TruVoice system.  No one I talked to knew what they were talking about; I was passed from one technical support person to another and told something different by each person I spoke to.
They had lied about the cost of the services I was supposed to be receiving - -  left out the part about the Internet access, that was supposedly included, being extra.   The reception was horrible; everyone I  have talked to since having this service has complained about noise on the line, inability to hear what I'm saying, etc.  Finally, I had had enough and have arranged to change phone and Internet service.  When I called to cancel Earthlink, they had the nerve to tell me there would be a $100 plus charge for the disconnection fee!  They claimed I signed a contract for one year, which it has not been; no one even mentioned a one year time period - I would have thought they were talking about how long it was going to take to get it set up and working, if they had!  I haven't signed anything for them and I'm not about to pay a disconnection fee.  How do companies get by with such things??
I have talked about my phone and Internet access problems before but don't believe I have indicated the company to which I was referring.  Well, I am now...................Earthlink and Earthlink TruVoice service.  Take the advice of one with experience - a horrible experience - you don't want to sign up with them!!  Two cans and a string would work about as well as their phone service!