When you face any issues with the Yahoo email account, you can always call the Yahoo mail customer support is offered via phone for all the premium members, which means for those who pay for it, the service comes for free. When you cannot sign in your account, this may be because of various reasons. One common reason is that your account is blocked for some reasons. But you need first stop trying and then wait for some 30 minutes. Then try again, and most of the times, you can enter into the account. If you still see problems, make a call to Yahoo customer service contact number. You can find that the customer support offers immediate answers. But if you are a free account holder, then you need to check for the help page or support page of Yahoo for the answers. If you want to speak to some professionals who can help you, then you need to make a choice from the lots of third party Yahoo customer support services available for the users.