What services exist for user identification by mobile phone number (sms)?

Question

SMS

It is required to bind the user to his mobile phone number. A person wants to access my system, enters a phone number on the identification page, the system generates a certain pincode for him, sends it to his phone, the user enters the pincode and gets into the system. What solutions exist to solve such problems?

Answer 1

There are no such. (and if you suddenly lied and abstract systems that perform the functions of authentication and transferring results to third-party applications exist, they will correct me).
Write the binding yourself, add a field with a phone number to regular login-password authentication.
The procedure is as follows:
Choose an SMS gateway (it's also a messaging system).
Write logic using the gateway API, it generates a pincode and assigns a pincode to the user (for verification and authentication) on the side of your system and sends it to the user by the gateway.
What is the system by the way? and that is a loose concept.
So, for some specific system, there may be a ready-made module (s) for working with a specific SMS gateway (s).
And to narrow down your search, describe what your site/system is based on.

Answer 2

The solution provides site visitors with the ability to instantly log in and register using only a mobile phone number. When registering a visitor, a mailbox with SMS notifications is automatically created. Each number is checked by the risk scoring system.
http://platformaly.ru/