I have a question that how to fetch the phone_number of a user by giving username or chat id. I know this question has been asked many times and everyone has said that there is no procedure for that but there is a website called Callmebot which has a form on which the user can enter the username and phone number will be shown, if the user phone number is public. Please, let me know if there is a procedure for it. I've to implement this procedure in a ASP.NET Core Web Application.
I'll be very thankful for your act of kindness.
Regards, Furrukh Nadeem
I've tried finding a way to solve this problem by doing literature review as well as seeing about more then 150 sites for this information and still I'm unable to find this solution.