I did a lot of research and thought this would be ideal for a friend of mine who was paying $43 with for US statewide domestic with call waiting, etc. with that rip off ATT.
Basic Talk works on broadband only and I know that if she had VOIP over wifi like I do, it would drive her crazy as there is often problem with people hearing (could be do to the fact that even if it's private wifi with password, the connection is shared with others unlike DSL type of internet connection) and even with all the extras that ATT add on to the costs, it included in their $10 fee. When I first called BT, I hit the right keys on the phone tree, for a person who wanted to sign up and I got helpful. Reps who told me what to do, and that one can activate and port the number only (although can be done online, was informed it would be faster, easier and no more expensive to have a customer service rep help.) The next day, since you can call in the order also for no extra charge, I dialed the number, and distracted, hit the wrong key, instead of new customers, the one for existing customers, then customer service and hence my warning. I was brought to a recording that said go to their website and write them. Two more times I tried to call them, and both times IMMEDIATELY it bypasses the phone tree and you can ONLY get the recording, "to go to their website," there was NO way to get to a live person (guess my number was programmed in their system to go directly to their recording after that call, as has happened with my Acer computer, if you put your purchase date in their telephone system you can never talk to them the day it goes past he warranty). It was good I found that out, because of my friend's age, she doesn't like to do things herself and prefers to do things with a CSA. It has good reviews and may be a good product, but I don't want to take that chance if she has problems she can NOT talk to a person but luckily that happened because I found a much better deal for her with Time Warner where for a penny more $10 vs. $9.99 she can get a landline (so their CSA says but I think it runs on broadband) AND they had a button on their modem so if you call 911 the police know where you're at which is the main reason my friend kept her landline) AND she can (for no extra charge) call foreign countries!