USA, Canada / Free phone calls from America to Poland? [9]

Dear All,
there is... you have this possibility using Vippie. It is an application for your smartphone, with other Vippie users you're calling for free! If you want to you can call any number in the world with very cheap price. Personally, i were using it during my studies in germany it was the cheapest way to call home;)

Travel / Sim Cards for International calls Poland [17]

Choose any you want to for example Play, and download Vippie on your phone, ask your friends for abroad to download it too, find wifi net and call them for free:)