Services
OTO Global Int'l Call
Enjoy international calls anywhere in the world at the lowest cost!
Free International calls
Free international calls from Korea to USA, China, Japan and other 91 countries!
(Pay for international calls by domestic calling rates)!
Free international calls from Korea to USA, China, Japan and other 91 countries! (Pay for international calls by domestic calling rates)
Over 5 million users have chosen the OTO service, unique international calling service without connection fee.
Enjoy the premium international call at the lowest rates.
Call anybody in the world, even if they do not have OTO Global app installed on their phone.
Free calls between OTO users
Enjoy the unlimited free crystal clear calls between OTO users anywhere in the world.
(3G/LTE data charges may apply based on your carrier subscription plan)
Easy to use Multimedia Messenger
Enjoy sending text, voice, photo and video messages, fun emoticons, sharing your location, and much more.
Revolutionary Group Messenger
With OTO Group Messenger it is easy to check who received or read your message at one glance.
Experience the perfect communication tool for connecting with communities.
OTO Numbers
Get your own OTO number to make and receive calls without showing your real number. You can get multiple OTO numbers to manage your personal and business life the way you want.
5,000,000
More then 5 million users trust our app In addition to core functionality we have added the new features like free calls between the users, free multimedia chatting, renting the online numbers etc.
247
We have the best mVoIP technology in the world, that makes it possible to call to 247 countries in the world.
1
The leader in international calling in Korea!
We providing the best crystal clear voice quality! One of the highest user ratings in Google Play Store! (over 4 stars)
0
0 cents to call to 94 countries in the world (when calling from Korea, Japan) The cheapest international calls! Supporting free calls to 94 countries (USA, China, Japan, Taiwan, Thailand, Australia, UK etc.)