If your mobile does not have the capability of making direct SIP calls, you can use software provided by VoIP provider to make cheap low cost calls to your loved ones.
Just download the software and define the access point and start calling.
Alternately you can make calls using 3 party softwares like Nimbuzz or Fring.
Do you know which VoIP is providing the cheapest rates for your region – check this.
[…] Through the SIP call software from the service provider (see article) 2. Other through 3rd party software such as Nimbuzz or Fring as […]