I'm afraid I can't give you an answer to this question but if you and she both have computers and an internet connection (preferably Broadband) you can both download a free SKYPE programme and call each other absolutely FREE.
Snap. Even if you use skype to a land line in Poland it only costs about a penny a minute- they were advertising this morning. Read all about it on skype.com. We have bought one for when kid goes to uni. in the Fall.