How do i send a text massage from my yahoo email account?

I notice that there is a small acon that says "new" if you clic on it. It says text massage..i do that and then enter the phone number but noting happens..What i am doing wrong...

How do i send a text massage from my yahoo email account?
1. Go to your contacts


2. Make sure you have the phone number on the contact


3. Click on the phone icon right below her e-mail


4. type away

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