Hey there, the steps to get started using an existing Concord 4 are detailed here.
Looking at that module, is that FW number 183-VZ? If so I believe that would be a 3G CDMA module, and even if it becomes unregistered (it is currently assigned to an active account) it can’t be activated on a new account due to the 3G carrier sunset.
If it is 3G it would need to be replaced to get started. Follow the steps in the link above to find a replacement module or panel. Let me know if you have any questions!