The "paper" on this tool would be incomplete without discussing the frequent issues logged on GSMForum.
You will need to disable Driver Signature Enforcement on Windows 8/10/11, as UMT uses custom USB drivers. umt card manager gsmforum install
Click the button. The tool will communicate with the server to refresh your card’s internal counter. The "paper" on this tool would be incomplete
Since UMT drivers are not Microsoft-signed, you must restart Windows with signature enforcement off: umt card manager gsmforum install
: Open the installed UMT Card Manager.