Call abroad at low rates from your Android phone.

Version 1.0.1  ·  Android 7.0 or later

How to install

1. Tap Download OTO for Android above.
2. When the download finishes, open the file from your notifications or your Downloads folder.
3. Android will ask permission to install apps from this source. Tap Settings, turn on Allow from this source, then go back.
4. Tap Install, then Open.
5. Enter your phone number and the activation code from your OTO card, then choose a 6-digit PIN.

OTO is not on Google Play yet, so Android shows a warning before installing. This is normal for apps installed directly from a website.