Edit Cisco 9951 with Service Mode

[Drokare]

I have a Cisco 7841 and I have the ability to edit the Service Mode to manually put in the Domain with Username/Password to connect to our external PBX.  I was given a 9951 and I would like to use it instead as the 7841 I take back and forth to the office.  But I can't find where or how to access the Service Mode on the 9951.

Does anyone know how to do this?

Thanks in advance.

[Jaime Valencia]

The service mode which asks you for a domain and user/pwd is meant for MRA, and the 99XX series are not supported for MRA.

https://community.cisco.com/t5/collaboration-voice-and-video/ip-phone-78xx-88xx-not-prompting-mra-login-screen/ta-p/3162705