OTO Free International Call is a free Android app that allows you to make international calls without any charges. With this app, you can make free international calls to the United States, Canada, Japan, and most countries in Korea. The app does not charge any international call fee and uses your additional/video call minutes given monthly by your carrier company. OTO Free International Call is an excellent app for those who want to stay connected with their loved ones living abroad without spending a dime.

The app offers free phone calls to most countries, unlike other services that offer free service to a limited range of countries. You can use international phone calls via local voice phone bills, so there is no need to worry. OTO Free International Call is a reliable app that guarantees high-quality voice calls. If you encounter any issues while using the app, you can contact their customer service center or visit their website for assistance.