9971 doesn't have admin setting and is not doing factory reset

[Phoenix3]

Dear all 

I have 9971 phone and I am trying to perform a factory reset and the phone is not resting

also in the setting menu I do not have administrative setting icon  there is only call History and running application 

the setting access is enabled in CUCM

[Chris Deren]

You can factory reset the phone using the following alternate procedure:

Step 1	Remove power from the phone in one of these ways: Unplug the power adapter. Unplug the LAN cable.
Step 2	Press the pound (#) key and plug the phone in.
Step 3	When the mute button is red and the top left and right line buttons are amber, enter the following key sequence: 123456789*0# The phone resets.

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/9971_9951_8961/10_0/english/adminguide/P567_BK_A27DADFD_00_adminguide-8961-9951-9971-10_0/P567_BK_A27DADFD_00_adminguide-8961-9951-9971-10_0_chapter_010100.html

[Phoenix3]

This the procedure that I meant by factory reset is not working .

The phone didn't apply it