answer:It costs nothing when both parties have skype and it works as well as your individual wifi connections. If one or both of your speeds suck or always cut out, it won’t work well. Don’t pay for SKYPE. It’s free. You can use skype to call cell phones or land lines and then it costs money. If you are out and about, some wifi systems won’t allow you to use SKYPE or stream movies because it uses up too much of their bandwidth, so you won’t be guaranteed to be able to use it at all ‘free wifi’ spots. I use it at home and have spoken to people in New Zealand, Germany, Holland and the US, and on my phone to keep in touch of my kiddo when he is at home without me. I use my 4G but only for the voice part, otherwise it would eat up my whole data package. I bought minutes once, but they expire, so beware. Also, I used their system of setting up a remote ‘local number’ so my family could call me on, to them, a local number and it would cost them nothing. I let it expire. They never used it.