antonius
Yes! Hey James, thanks for the idea. I am changing my mobile number to 901- 801- 7012. Getting too many prank calls on my present number. Just joking! However, you might try the Jesus believers; they say that they know a god, and he sent a son to earth; how? nobody knows, they don't either, but they claim that son gave his life to save people, so man if he can come to earth as they claim and get his aXX killed then poof himself back to life he ought to be able to by-pass Yahoo rules and help you. Ask one of the believers, they surely must know; they are here at all hours claiming how great the fictional Jesus is!
James
need to change my mobile phone NUMBER to 509-558-9064
oklatom
You can not.
To quote the help page:
Wrong date of birth listed
For security reasons, it isn't possible to update or change the date of birth listed on your Yahoo account, even if you entered it incorrectly when you first registered your account. You'll need to open a new account if you'd like your account to reflect your accurate info.
Anonymous
You can't, Yahoo says no-no to changing DOB and your gender,,,for now anyway
Sharon
The birthdate cannot be changed in your account for security reasons: https://help.yahoo.com/kb/sln27267.html