Hi all, hope someone here can help. I am running an * Box behind a NAT. I have a dd-wrt router w/ milkfish (rtp-proxy) set up. I installed 3cx android on my Hero Sprint. When I'm on my WIFI network, 3cx works like a charm. When I disable wifi and test over 3G, is when I'm running into problems. First, the positive. I can call local network extensions and they can call me and have a conversation! An outside number (cell or POTS) can call my * box and reach my HTC Hero 3cx android enabled extension and have a conversation over 3G. Pretty cool. When I try and dial an outside number (cell phone or POTS) is when the problem occurs. I can't get audio to work. The call reaches the party but when connected, i get dead air. Party can't hear me and I can't hear them. Any suggestions would be greatly appreciated.