The Xidol K5188 is likely a 3G (HSPA) modem with max speeds of 7.2 Mbps down / 5.76 Mbps up. In 2025, 3G networks are being shut down globally.

Assume you have downloaded a driver archive named Xidol_K5188_driver.zip.

After installation, expand Modems in Device Manager. The Xidol K5188 should appear. Under Ports (COM & LPT), a new "Communications Port (COMx)" will appear.

After the driver is installed, you may need to configure the dialer software (often a generic "4G Hostless Modem" UI) to connect to your specific carrier: