title: Premium SMS billing solution
body: <p>Are their any good solutions for sending mobile content to users for a monthly fee? I'd like to have it so they enter a number in the web-based opt-in page and then they have to confirm a pin to confirm their subscription. I can't find any arregator that allows for monthly billing for US carriers. Any ideas?</p>
  
  <p>My application is in PHP an API would be necessary and I'd like to have the payments go on their mobile phone bill (not manage myself)</p>