Online customers more often than not need a lot of help and support in transitioning their email application from a web server to a mobile app. This requires certain subtle changes in the settings or configurations of the mobile app which would then automatically get synched with the Yahoo email account. Therefore, in case of such a situation, customers can feel free to contact the Yahoo Customer Service team seeking their guidance on the synchronization issue. The team of support personnel is contactable via their toll free yahoo phone number which is active round the clock. They can also connect using mails and chats features.