..::need software to make free calls from pc to phone::..

i need software to make free calls from pc to
phone............

i mean totally free!

i try on these sites but
not work.

voiplowrate after 1 day it say free trail limit
expires.

[You must be registered and logged in to see this link.] this also not work.

i try also with
skype..................


is there any trick to make unlimited free
call without any credit card or payment?



..::HUM::..