Its a free calling service and a right timing for festival season (Sankranthi, Pongal celebrations in India). The service claims no registration is required and just enter both US number and India number. Pick up the US number when it rings and the service connects to the destination number.
Here is the free calling link
Here is how to make free calls :
1. Enter your Number
2. Enter Destination Number
3. Click on Call Now!
3. You will get a call from our system instantly, please accept the call
4. Hold while the system connects you to the destination number