Stop trying to force me to give a cell phone number, I do not have a cell phone.
Stop trying to force me to give a cell phone number, I do not have a cell phone so there is no way to use one to get a security code or any other thing.
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Sorry Ian! That's the standard for signing up with Yahoo! If you have an issue with this, you can certainly contact our Customer Care team at help.yahoo.com. They handle issues with account and signing in, and manage the sign in flow which requires a phone number.