I am using 3CX v14 on a Windows 10 PC and have installed 3CXPhone for Android on a Nexus phone. The 3CXPhone is registered with PBX and can receive calls when a caller calls the PBX and enters the assigned extension, but the 3CXPhone shows DISCONNECTED and I can NOT make calls from it. I have configured Android PUSH and it works. I have all the required ports forwarded, as shown here: http://www.3cx.com/blog/docs/ports-used/ What can I do to fix this? Thank you.