We highly recommend downloading and using the free phone app WhatsApp. WhatsApp is very common throughout Europe and allows you to make and receive calls to and from other WhatsApp users for free, wherever you may be in the world!
Check with your cellphone carrier to make sure you have internet data available on your phone while traveling in Europe. Some companies charge a fee for this, while some carriers, like T-Mobile, make international data available to their customers at no charge. Just check with your cell phone company before you leave the USA to be sure your service will work once you arrive in Europe! And connect to wi-fi whenever possible to reduce international data charges and avoid hitting your data limits. San Felice Resort has free wi-fi available for its guests.
To dial international numbers from the USA, you'll typically dial: 011, then the country code, the the number. The country code for Italy is +39. Be aware that unless you have an international calling plan, your cell phone provider might charge you a ridiculously high per-minute calling rate! Get WhatsApp -- You'll be able to make calls to Italy for free. Both the San Felice Resort and Verona Transfer can be reached through WhatsApp. So can Song Camp Europe: +1 312 420 5306.