Can I use this app to make domestic or international calls? March 05, 2019 19:41 Updated Yes! You can use this app anywhere, as long as your phone has a data connection (Wi-Fi or cellular). Related articles What happens if a number I call is not on the Unlimited plan? Which countries can I call? Which countries can I call? Can I make calls over Wi-Fi without a cellular connection? If the country I want to call is not on the Unlimited plan, what is the rate per minute? Comments 0 comments Article is closed for comments.