I have created a script in a day for V12 to do this but I am sure you guys could integrate it directly. This would allow multiple phone numbers (Home, Business, Mobile, Business2) to be imported into the phones. Also it enables super search on the yealink phones. Which all that should be required would be to put the super_search xml file in the provisioning folder and also modify the yealink templates to point them to the super search xml. This is not supported by 3cx.