發送短信 : The US case : what can we learn from it?

 ______      ___     __   __   _    _     _____   
|      \\   / _ \\   \ \\/ // | || | ||  / ____|| 
|  --  //  | / \ ||   \   //  | || | || / //---`' 
|  --  \\  | \_/ ||   / . \\  | \\_/ || \ \\___   
|______//   \___//   /_//\_\\  \____//   \_____|| 
`------`    `---`    `-`  --`   `---`     `----`