Dingtone a Miamin Systems Company ,Free Calling App Releases New Phone Numbers In 11 Countries, Reaches One Billion Calling Minutes Per Year. Dingtone, a free calling app, has been offering calling and texting services worldwide with phone numbers of these following 7 countries: USA, Canada, UK, Australia, Netherlands, and Belgium. Now the number of countries has increased to 17, with 11 newly added countries: France, Poland, Austria, Puerto Rico, Czech Republic, Malaysia, Denmark… From now on, users around the world have more options about their second, third or even fourth phone numbers. With Dingtone, you could make cheap even free international calls to over 230 countries, whenever and wherever needed. You can call any mobile or even landline phone number in over 200 countries, including people who don’t use the app.