Its simple...!!!

Go to wifi zone......

Installl "FRING" from www.fring.com

and then u wll find yahoo, gtalk , msn, "SIP" ..

click on SIP ,

Enter your Action voip ID & PAssword and
Proxy address:sip.actionvoip.com

and do the same way for the freecall also by changing proxy address as "sip.voiparound.com" ....

Have a nice time..............