Windows 10 and 11 block unsigned drivers by default. If your Windows has this requirement , :
Download a reputable comprehensive package like the Xiaomi Tools MTK Driver Auto Installer or a certified generic MediaTek driver pack. nokia rm 1187 usb driver mtk
Select from the list of hardware models, click Next, and finalize the wizard. Windows 10 and 11 block unsigned drivers by default
On modern versions of Windows (10 and 11), you must before installing these drivers, as they are often not digitally signed. Hold the Shift key and click Restart . you must before installing these drivers