Please note that D120 is not a supported device by 3CX so there is no template available for this phone. You can see a list with supported devices here.
ok, but i would like to know if there is any internal plan to add it in the provisioning list of the supported devices. Are you going to certify it as you have done for the other snom models?
Please note that we have these phones and we are currently testing them. These phones ship with firmware 10 which pose some issues we need to overcome. We are working with Snom on this and we hope to overcome the issues soon.