Sometimes I wonder why nobody notices that OP no longer responds to this thread.
Either the problem has been solved or due to something else.
If I were OP, I would thank anyone in this thread for giving useful answers. ^ __ ^
Other people who experience similar problems might try the solutions available in this thread.
One more solution to overcome the problem is to create a Yahoo account with email and not with a phone number. The process is simple. Simply create an account with your phone number and create one or more accounts with the email that was verified with that number. As far as I know, Yahoo allows anyone to create another Yahoo email simply by adding an already registered Yahoo account (no verification by phone, only verification by email, may not be available in some countries / user accounts).
Anyway, does anyone know the benefits of having multiple yahoo accounts? I have one and it gave me a headache. I could not imagine having two or more. 
