From Where That East Indian Telescam Industry Came

 1/27/21 New York Times Magazine:

The reasons this activity seems to have flourished in India are much the same as those behind the growth of the country’s legitimate information-technology-services industry after the early 2000s, when many American companies like Microsoft and Dell began outsourcing customer support to workers in India. The industry expanded rapidly as more companies in developed countries saw the same economic advantage in relocating various services there that could be performed remotely — from airline ticketing to banking. India’s large population of English speakers kept labor costs down.

Because the overwhelming majority of call centers in the country are engaged in legitimate business, the ones that aren’t can hide in plain sight. Amid the mazes of gleaming steel-and-glass high-rises in a place like Cyber City, near Delhi, or Sector V in Salt Lake, near Kolkata — two of the numerous commercial districts that have sprung up across the country to nurture I.T. businesses — it’s impossible to distinguish a call center that handles inquiries from air travelers in the United States from one that targets hundreds of Americans every day with fraudulent offers to lower their credit-card interest rates.

This has been my suspicion for some time:  the relocation of U.S. support operations to India created the telephone infrastructure and likely put the ideas for these telescamming operations in the minds of criminals in India.