First Step - Clearing Auth Credentials

Before factory resetting your device, you must perform a task in the portal.
Please note that if you do not see these options, please contact Support before factory resetting the device.

1. Log into the portal.
2. Navigate to the domain you need to work on.
3. Go to Inventory -> Phone Hardware.
4. Find the phone you wish to factory reset and click the edit button.
5. Click on Advanced.
6. If you factory reset a Polycom device, record the Auth password, as you will need this.
7. Clear out everything in the Auth User and Auth Pass.
    

Grandstream factory reset

1. On the phone itself, navigate to the menu(Usually the center button in the D-Pad)
2. Find the System and select it.
3. Scroll down and find the option Factory reset, Select it.

Yealinks factory reset

Note: DO NOT factory reset without consulting support first, as additional steps are required for the redirection servers to allow the phone to reach us again. 

1. On the phone itself, find the X Button (Or the OK Button)
2. Press the X button and hold it for around 10 seconds
3. The phone should reboot, and factory reset itself

Htek factory reset

1. On the phone itself, hit the menu
2. Then dial ***
3. Then press 2 to factory reset

Htek - 921G factory reset

Polycom factory reset

1. Power off the phone
2. Power the phone back on
3. When you see "Starting application," hit cancel
4.  As soon as you see the "Welcome" message, press and hold "1, "3," and "5" simultaneously.
5. You then be prompted to enter the password.
6. Enter the Auth password you recorded in the "First Step - Clearing Auth Credentials." The password is case-sensitive.
7. The phone will now factory reset itself.

Avaya J Series

1. Go to settings on the phone
2. Go to Administration
3. The default phone password is 27238
4. Go to Reset to default
5. The phone will now factory reset

SNOM