With Infocaller App you will be able to make outbound calls using your virtual numbers. You will also be able to save on calls using its different call modes:
Outbound call: The App connects you to a local Infocaller access number and then connects you to your destination. If you have a local-call flat rate, you will have access to our very low international call prices.
VoIP call: If you do not have a local flat rate, or if you only have access to a data connection, you can make VoIP calls using data.
Callback: Infocaller calls your phone and then connects you to your destination. It does not use outbound minutes in your phone line.