Highest quality international calls at the lowest rates, unlimited free calls to OTO users,
purchasing real phone numbers with OTO Number service
and multimedia messenger are just some of many features you can enjoy with OTO Global app.
1) OTO international calls / SMS
Over 5 million people are already using OTO to make the crystal clear quality international calls at the lowest rates.
2) Free calls to OTO users
Enjoy completely free high quality unlimited calls to OTO users anywhere in the world using your WiFi or data connection.
3) OTO Number
Get your own OTO number to make and receive calls without showing your real number. You can set up to 5 numbers to manage your personal and business life the way you want.
4) OTO Messenger
OTO messenger lets you send text, voice, photo and video messages, share your location and much more. Enjoy communicating with your friends and family with OTO messenger.
Do not hesitate to contact us with any inquiries or suggestions. We are always happy to hear from you.
Message Board -> More > Question and Answer
Customer Service Center: +82 2 1600 0546