Yealink CP920 - Call Completion

Yealink CP920 User Guide
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The phone will be reset successfully after startup.
Note
Reset of your phone may take a few minutes. Do not power off until the phone has started up successfully.
Updating the Phone Configuration
Your system administrator may ask you to update your phone configurations.
Procedure
1. Navigate to Menu->Settings->Basic Settings->Update Configuration.
2. Tap OK.