Hi,

Currently, a normal provision of new D120 phones is impossible with the versions mentioned. Only via detours, which will certainly have to be repeated manually in future updates.

Only firmware 10.1.54.16 is known to the 3CX system. (https://www.3cx.com/support/phone-firmwares/)
Unfortunately, the new firmware 10.1.54.24 is not yet available.

According to 3CX support, this is because Snom has not yet created a new template.
https://www.3cx.com/community/threads/snom-d120-with-3cx-v18.116927/post-543124

Is there more information on this topic, ideally with a time estimate until the solution? :-)