I have a work Microsoft Exchange email and 2 Yahoo email accounts. I set up all and have received emails for some time now....all of a sudden my phone is dropping my 2 yahoo accounts - but not the Microsoft Exchange email. I set them back up and it could be hours or days later again drops one or both. I have turned the phone off and restarted hoping this would help with no luck. Phone is only a couple months old.... any thoughts or advises? Thank you. Kari