OTO Free International Call

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About this app

OTO Free International Call app provides free international calls and it doesn't charge any international call fee, while it uses your additional/video call minutes given monthly by your carrier company.

[Main Functions]

★ Free International Phone Calls
- You may place free international phone calls to the United States, Canada, Japan, etc. to most of the countries in Korea. (However, free phone calls are available according to the payment plans of smartphones.)

★ Why OTO Free International Phone Calls?
1. OTO Free International Phone Call is free because it does not incur costs for any international phone calls placed.
2. You may use international phone calls via the local voice phone bills, so no worries.
3. Unlike other services that offer free service to a limited range of countries, OTO offers free phone calls to most of all countries.


If you encounter any inconveniences using our service, please do let us know. We are always all ears for your valuable opinions.
- website : www.otocall.com
- call center : [phone]

Ratings and reviews

It seems USA is no longer available. I had been using this app for a while and it was great. But now it's pretty useless. Hopefully this gets updated and I can change my rating.

It is good as a free overseas phone application but sometimes It seems to be the quality of the call is bad and my voice is automatically changed. I can hear the counselor's voice change from time to time. It sounds like scared. It's a greatest free app, I'm sorry i couldn't give 5 star.. it sounds rude but it's true due to the quality of the phone.

I used this app for the last 9 years to call Bangladesh. But last few months, notified that not available this country. Why?