Look for professional programmers to develope sms gateway provider , so i can let the customers to subscribe then purchase the credits to start using the service , he can send sms,mms,image,ringtone,logo,flash .. etc
Please read the attached file for details.
4 freelancers are bidding on average $99 for this job
I havve worked on numerous SMS gateway sites with many different integrations. I will not be able to do the project for 100$ but if you have an extendable budjet please pm me and lets talk it over thanks.