Yealink CP920 - Unlocking Your Phone; Changing Your Phone Unlock PIN

Yealink CP920 User Guide
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The lock icon appears on the phone screen.
Related Topic
Setting the Phone Lock
Unlocking Your Phone
You can use an unlock PIN to unlock the phone.
If you forget the unlock PIN, you can enter the administrator password to unlock your phone, and then automatically
access the PIN change screen.
Procedure
1. Tap any locked key, the phone prompts you to enter an unlock PIN.
2. Enter the desired PIN (default: 123) in the Unlock PIN field.
3. Select OK.
The lock icon disappears from the phone screen.
Changing Your Phone Unlock PIN
The default unlock PIN is “123”. For security reasons, you should change the default unlock PIN as soon as possible.
Procedure
1. Navigate to Menu > Settings > Basic Settings > Change PIN.
2. Enter your old and new unlock PIN respectively.
The unlock PIN length must be within 15 digits.
3. Select Save.