<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> If you wish to recover your Yahoo phone number, then you need to access the Yahoo account security page. Next, you need to snap on the mobile number or on the email address. Next, snap on the add mobile or email address. For further queries, contact our support team.https://www.mailcustomer-service.com/ <a href="https://www.mailcustomer-service.com/">Yahoo phone number</a>