At this point, cell phone is a necessity in India to get any services. Mobile subscriber base is about 1.1 billion (1) which means almost all adults have a cell phone connection. So the question is practically moot.

(1) https://www.google.com.sg/amp/m.timesofindia.com/business/in...

Practically moot is a varied distance from moot. I was just curious if there was an underclass that was unable to get any services. It's much the same in my country, really.

> At this point, cell phone is a necessity in India to get any services

And in a delightful catch-22, Aadhaar is essentially a requirement for obtaining a cell phone.

You can bypass this with some other documents and providing a landline that they verify within a week, but it's incredibly cumbersome.