If you have the question what is the customer service phone number of yahoo mail? Then the answer to your question is the number is shared over internet web page. Also you can get it from contact us page of Yahoo. Both the number is same and toll free. The fact you should know about Yahoo contact number so that you never get distracted is Yahoo phone number is toll free always. Means Yahoo never charges their user for calling on their helpline number ever and its helpline number works round the clock. So, never get misguided with the number of Yahoo.