the most awaited internet calling feature has come up with the galaxy s4 now galaxy s4 has a native VIP client once you go to the settings and then my device and click on the call then at the bottom you can see the internet calling feature you can have it for all the calls or only for internet calls or it will have the option to ask for either each call so let us select any of one of the option like ask for every call then we can add the account so first you can select for either to receive incoming calls as well so we add account username and password another sip server then we can also add other optional settings like authenticate user name display name port number other things once it is done it will save your sip account which can be used for calling thanks for watching you.