Temporarily disable antivirus software that may block the server communication.
Avoid using hubs. Plug your UMT dongle directly into the PC to prevent data corruption during a card update. umt card manager gsmforum verified
Plug your UMT Dongle or UMT Pro Key into a stable USB port. Ensure you have the latest drivers installed so the PC recognizes the smart card. Run as Administrator: Right-click the Card Manager application and select Run as Administrator to avoid permission issues. Get Card Info: "Get Card Info" Temporarily disable antivirus software that may block the