We have faced a problem, recently we have migrated to a CUCM9 we simply import our config to the CUCM (after solving its problem), after switching to new CUCM we had issues with some phones, hence we deleted the configuration security trust list and ITL file, after this the phones started to be registered but we lost some services like Voice mail (the button), Directories and phone designer services.
To check the problem I tested another phone which had not the same issue, I deleted the security trust list and bang the same problem appeared.
I do not understand what is the problem I tried
New Firmware and old Firmware.
I tried factory reset
You stated you imported your configuration to CUCM. How did you export/import the config? Have you checked to confirm your Voicemail Profile and Voicemail Pilot are configured in CUCM 9? Have you also checked under Device > Device Settings > Phone Services to confirm all of your previous services moved over correctly?
I agree with Tony, but based on your post it sounds like you do not have any phones in your CUCM 9 environment that are working as expected to compare against.