If you can tell me (e.g., UMT Pro or standard UMT Box) and what error message you are seeing , I can provide more specific troubleshooting steps from the GSM-Forum. Go to product viewer dialog for this item. UMT Box Smart-Card
The is an essential maintenance utility for users of the Ultimate Multi Tool (UMT) box or dongle . Primarily distributed and discussed on GSM-Forum (GSMhosting), this tool is required to keep the physical smart card inside the dongle synchronized with the latest software updates and official server authorizations. Core Functions of UMT Card Manager umt card manager gsm-forum