I cannot use our MAgic JAck phone because of an erro.

contact magic jack

that phone should work with magicjack , you are not getting a dial tone because you are no setting it up right somewhere along the line ,

If your tv has internet access and you can run their software on it then it will, otherwise no.

...and did you check your internet connection or visit customer care at magicjack.com? Why are you asking about it here?

How do i disconnect from magic jack and than reconnect with a different user name and password?

The phone will only show the information that it is given by your phone service provider (Magic Jack).

plug in magic jack into usb slot,wait for processing enter your mail id and assign password to your magic jack account, t will generate tr phone no.

I have and use Magic Jack too..Does your Latitude Communicator just plug right into a phone jack with a regular phone cord? If it does, then it should work...You will have to always leave your laptop on and never turn it off because Magic Jack requires a constant connection...Plug your equipment into the back of your Magic Jack and then with another phone, call the company that monitors your pacemaker/defibulator and ask them to "test" your line to see if you will receive a signal from them through your Magic Jack...You will to have to plug it all in and then test or you won't ever know...When I plug my home phone into the back of my Magic Jack, I receive a dial tone just like it was connected to a home based landline phone