In order to fix the issue, download the updated version of Mobile Partner and install it following the on-screen instructions. After that, configure your security program and Windows Firewall to allow it to communicate and try to make a call. If the problem persists, press Alt + Ctrl + Delete key combination, open Task Manager and close all unnecessary applications (chat messengers, download managers, browsers, etc.) that use your Internet bandwidth. If you still have issues, use the Contact Us web page to get in touch with the support team.