If in case you are unable to open the Yahoo account then first check that you are mentioning the right details on the sign-in page and then examine the internet connection if then too you are incapable to open the Yahoo account then Yahoo customer service by just making a call or dropping a message at 1-833-293-8333. Feel free to contact us at the provided number as we are 24/7 available to help our customers 1-833-293-8333.