I am getting ready to import our extensions into 3CX and tried a test template to get a feel for it. Everything went well except it did not pre-populate the phone even though I included the MAC address and template. The phone did not exist in the system before import, am I not able to add phones via. the mac address in the import file unless the phone is already connected to 3CX? Also, in the import file, do I need the ".ph.xml" extension behind the custom template name?