Three thoughts: 1. Others have raised legitimate privacy concerns (domestic abuse victims, journalism, etc.). I don't have a good solution for that, but suspect such a solution can be created. This concern is truly global, so looking at the solutions used in other countries might provide ideas. 2. The quantity of junk/fraudulent calls that occurs in USA vs. Germany is astounding. I am a citizen of USA with long-term residency in Germany. In Germany I receive essentially zero calls that appear to be phishing or seeking to perpetrate fraud. I suspect this is because most German phone numbers are associated with an ID of some sort. By comparison I receive multiple robo-calls daily on my area code 612 (Minneapolis) phone number, claiming I have insurance benefits waiting to be claimed, or similar bogus situations. 3. In Germany and many (all?) other countries in the European Union, retaining a phone number for longer than a relatively brief period requires providing the phone carrier with a verified ID. That ID can be a foreign passport or (for most people) a national ID card. Activation of a new number is allowed for a limited period (I don't know the exact number of days but long enough to cover most tourist trips), and retaining the number beyond the limited period requires proving identity. That proof can be offered in multple ways, including a brief video chat in which I must show my face, then my passport (to ensure a match), and finally hold the passport at an angle so the presence of security features can be validated. I point out the German practices because I don't believe Germany is run by tyrants and yet collects basic identity data--a system that seems to work to reduce bogus phone calls.

A curious person will want to learn; without curiosity, anything is rote memorization and won't go far.

Don't assume good electricity and don't assume internet connectivity; it may not exist. Don't assume basics like keyboarding skills and mouse movements. In fact, don't assume much. Learn from knowledge gaps observed elsewhere: A friend who tries to bring science to rural communities in Maharashtra starts by teaching kids about the difference between an analog watch & a compass. It may seem silly, but if a person has little experience with either may not know the difference. Back to the curiosity: get the child curious about how the compass always knows to point north. Then show how a nearby DC current (battery / wire / light bulb) can move the needle. To me, these give the grounds for engaging curiosity.

Whenever the teacher then gets around to computers, a curious person will want to know why backspace allows corrections to happen, how a spreadsheet can do math, etc.

And expect all levels within India as is true throughout the world: Each person is unique. Some people are geniuses awaiting discovery; others will be lazy or lack the natural talent to thrive with technology.