The following are the most popular affordable calling options to call India from the USA.
Vonage is the most popular VOIP service for India calling. The voice quality is quite good and they have good support for mobile apps as well. You can use the app to call India using Wifi should you are not be near the phone line. Know More
Skype or whatsapp
whatsapp call is quite good and better than regular mobile phone calls, we can do both video calling and voice calling in whatsapp, skype can be done both on mobile devices and laptops.
Cheap calls to any mobile or landline - no internet connection is needed. Know More
VOIP services which offer India calling at good rates. Know More
The customer needs to buy the magic jack go instrument, this service requires no monthly subscription fees. Know More
Their calling rates are quite cheap and voice quality is decent. They have android and iphone apps for support too. Know More