Hi, This is my first post. I've had a look around the forum and can't find the same problem I have so here goes and I someone can help. 3CX PBX behind a firewall on a Public IP Windows 2003 Server HTC Desire : Android Version 2.2 3CX SoftPhone : 1.2.9 Operator : Vodafone The issue I have is that when I connect using my mobile phone I don't get any functionality at all, other then the extension being registered ok. The status lamp is amber when connected externally and green when connected on the LAN. Using the wifi connection onto the LAN everything works as it should do. Any help would be very much appreciated. Thanks.