Windows 10/11 blocks unsigned legacy drivers. To bypass:
If the internal storage is corrupted or you cannot find the file, you may need to download the driver online. Since "Xidol" is a generic brand, the modem likely uses a chipset from a major manufacturer like Qualcomm, MediaTek, or Spreadtrum.
If the standard driver fails, try this:
If you still have the original mini-CD, the driver folder (\Drivers\K5188\) contains the exact .INF file.
The Xidol K5188 is a USB cellular modem (also marketed under similar model numbers) used to provide mobile broadband via 3G/4G USB dongle form factors. Drivers enable the device to act as a modem and, in many cases, present a virtual CD-ROM with connection software. driver modem xidol k5188
Old Xidol drivers were not digitally signed for new Windows versions. You must disable driver signature enforcement:
The driver modem Xidol K5188 is a classic example of "legacy hardware that refuses to die." While it is outdated (limited to 3G/HSDPA speeds of 7.2 Mbps down / 5.76 Mbps up), it remains useful for: Windows 10/11 blocks unsigned legacy drivers
However, for daily browsing, consider upgrading to a 4G LTE or 5G dongle from Huawei, ZTE, or Alcatel. The driver support for those is plug-and-play.
If you must use the Xidol K5188, bookmark this guide. The driver is not available on Microsoft Update Catalog, so manual installation is your only path. Keep a backup of the working .inf files on a USB drive or cloud storage for future re-installations. If the standard driver fails, try this: If
Note: Manufacturers frequently update hardware revisions. If the steps above fail, identify the exact USB VID/PID via Device Manager (Details tab > Hardware Ids) and search for a driver specific to that ID string (e.g., USB\VID_12D1&PID_1506).