Add Mobile number

Hi @educationguideonline!

You would need to do some custom coding for this. You can see an example code here, how you can add additional fields to the registration:
https://nextendweb.com/nextend-social-login-docs/backend-developer/#custom-fields
and you could create a field to ask the phone number.

That code could go inside the functions.php file of your theme or you could create a plugin, which would only have this PHP code.