text: i am trying to use pc to phone service to call overseas but my call is not going thru. any help. thanks?   what software are you using? if it's skype, the calls from pc to landlines overseas are not free. you have to subscribe to skype's call service. only calls originating from the u.s./canada going to landlines  also within the u.s. and canada are free. get more info here: http://www.skype.com good luck!