Well this version 12 seems to be a disaster, first all the issues with the extensions not working and now that I have that resolved, anyone that calls in CAN NOT HEAR ME, however, I can hear them. Version 11 and softphone 6 worked great but this one is a headache. ALSO I have set the forward to mobile phone, and if I dont' answer and let 3cx dial out to my cell phone then it works perfectly. I can hear them and they can hear me, the only issue is if I answer the softphone. What could be causing this?? Can I use version 6 softphone on 3cx phone system 12? So dissapointed in this softphone. My 3cx is on a static ip and the STUNN requests have been turned off. Using COX isp.