Telerivet supports connecting third-party VoIP providers or devices to send and receive voice calls in Sao Tome and Principe. 

Learn more »

Other Options

The Telerivet Gateway app supports receiving notifications of incoming calls in Sao Tome and Principe, although IVR is not supported for calls received via this method. 

Telerivet can also send outgoing voice calls using Twilio with using a verified caller ID in Sao Tome and Principe, although incoming calls cannot be received via this method.