How to determine the mobile phone number of a site visitor through 3g, 4g?

Question

mobile connection

Condition: the user goes to the site www.123.test from a mobile device via 3g, 4g connection.
Question: how can I automatically determine the mobile phone number of a user who has visited the site, without using additional "Enter phone number" forms and setting up the msisdn transfer operator?
Ps mobile operators have a msisdn transfer function that connects to a specific domain name. This method is not entirely suitable, since a separate agreement must be concluded with each operator (which is a big hemo ***). The resource is also aimed at a foreign user, so a unified solution is needed to determine the subscriber's mobile number.

Answer 1

No way