How to Build an SMS Service
We hope this has been helpful to you in planning and implementing your own SMS service. We've covered both aspects of SMS service interface design as well as the backend implementation. To those of you with web service or client application development experience, many of the concepts should have been familiar, just arranged in a new way.
Ultimately, there is nothing truly special about SMS: it is a simple text-based input/output protocol to your connected application. What is special is what you do with it. Go do something special.