If my phone plan includes unlimited talk and text, will I be charged extra for international calls?

It is better to address your provider and ask. In case you need to make international calls often, I recommend using the Rebtel application. It allows calling to more than 50 countries. The prices are very low. Moreover, you can use your mobile to make your calls without the Internet. In case you still have doubts, call Rebtel customer service https://rebtel.pissedconsumer.com/customer-service.html and find out more. But as for me, this is a great choice.