For older Symbian or Nokia X-series phones with MTK chips, Nokia (now HMD Global) provided a PC Suite that included the drivers. However, for modern Nokia Android phones, the drivers are not publicly packaged by HMD. In that case, rely on Method 1.
Some X-series use Qualcomm. Always check. The Nokia X20 uses Snapdragon 480, so this driver will not work. Use Qualcomm QDLoader driver instead. Nokia Mtk Usb Driver 64 Bit Download