If unsure, use or check the FCC ID printed on the device.

Do not keep multiple versions of the driver. If you have previous Huawei software:

Tools like or Snappy Driver Installer often fetch the correct Huawei COM driver automatically. These are safe if downloaded from their official sources. They work by scanning your unknown device and matching it to a community-maintained database.

When you plug in a Huawei device (e.g., E3372, E3531, E3276, or older USB dongles), Windows may detect several virtual components: NDIS (network adapter), a CD-ROM (driver installer), and one or more COM ports. is the primary diagnostic/control port.