Developer Needed - Dating Site Connecting Phones

If you aren't located in the USA, do NOT bid. This is a very simple dating site which connects users together by phone. As the host, I'd like to connect both calls without paying for VOIP. You must understand how to implement this app technologically and be able to start as soon as possible. When a user joins, he will be connected with another user through their mobile phones and have a certain amount of time to speak. After this time is up, my website will disconnect/terminate the call. That is the main feature although there are other minor features needed. In your bid, you MUST explain how you will go about implementing this app from a technological standpoint. Thank you.