This article will provide the steps on how to disable the STUN Sever in Zoiper.

Please Note: Zoiper is Third-Party. Also keep in mind that our assistance in troubleshooting it is entirely on a best effort.
1. Click on the settings icon on the top right:
2. Click on "Account":
3. Click on your account:
4. Click on "Advanced":
5. Scroll down to the "
Network related" section, click on the options next to "
Use STUN" and select "
Don't use STUN":
6. Click the arrow on the top left and save the changes: