I have an active yahoo account, but I don't have the option to send sms messages. What is the rollout strategy?

you can send free sms messeges go on google and type free sms

you can use email to send sms messages. If you know the other persons provider. Such as, if the providor is Example Corp and the number is 555-555-1234 then I can send email to 5555551234@gateway.example.com to send text to that cell phone.Google for the providor and text messages to find out how they work theirs.