Some dongles allow you to open the plastic casing. If yours does, carefully remove the SIM-sized smart card and clean the golden contacts with a soft, dry cloth or an eraser before re-inserting it firmly.
: Missing or incorrect drivers prevent Windows from recognizing the hardware. Device Manager and check for "Smart Card" or "Smart Card Reader". If you see a yellow exclamation mark, manually install the Smart Card Driver Reader Driver Uicc Iso Device avengers tool missing smart card best
Before diving into the fixes, let’s understand the anatomy of the Avengers Tool. Some dongles allow you to open the plastic casing