It appears that the phone is attempting to register using the MRA feature.
By the way, could you provide more details about your call control platform and setup?
What type of firmware do you have in your phone, Enterprise or MPP? If it is Enterprise you get this if the phone cannot get its configuration from CM. That can be caused by a number of factors, like the phone not being configured in CM or the TFTP server not being presented in the DHCP scope.
Apart from this you might want to look at and update the picture you shared as that is showing your cell phone number.
Follow the instructions on this page. Convert Cisco 7800 and 8800 series IP phones between Enterprise and MPP Firmware
The phone firmware can be found in the phone settings. Another easy way is by accessing the GUI of the phone, where you can quickly differentiate whether it’s the enterprise version or MPP.
When it’s MPP, you have more options on the GUI.
If it’s not an MPP version, you must convert them to MPP versions, and this also incurs costs. Follow the guide that @Roger Kallberg shared. Alternatively, reach out to the company that sold you the phone and obtain MPP version phones.
The list price at CCW (Cisco Commerce Workspace) is 65USD. The actual price you'd get depends on the vendor you reach out to as the list price is "just" to be seen as a recommendation and not the actual price you would pay.
