Standard internet: Windows will create a new network connection (use “Dial‑up” or “Mobile Broadband”).
AT commands: Use a terminal (PuTTY, RealTerm) on the Diagnostic COM port (e.g., COM7) – baud rate 115200. zte dc general sale driver
Switching modes:
Send AT+ZCDRUN=8 to disable CD‑ROM mode (permanent), or AT+ZCDRUN=9 to re‑enable. The ZTE DC General Sale Driver: Bridging Legacy
Unlocking / IMEI repair tools (like DC‑Unlocker) require the Diagnostic port – that’s why this driver is essential. Standard internet: Windows will create a new network
In data centers, driver and firmware mismatches are a leading cause of unexpected link flaps and packet loss. ZTE distributes its General Sale Driver in tandem with validated firmware versions. Using the driver alone without the matching firmware can void support contracts and degrade performance.
| Problem | Likely Cause | Solution |
|--------|--------------|----------|
| "Unknown Device" in Device Manager | No driver or USB power issue | Reinstall driver, try different USB port, use powered USB hub. |
| Driver Signature Error (Windows 10/11) | Unsigned driver | Restart Windows → Disable Driver Signature Enforcement (Shift+Restart → Troubleshoot → Startup Settings). |
| Modem switches to CD-ROM and stays there | Mode switching failed | Manually eject the virtual CD-ROM in Windows Explorer, or use ZTE_Mode_Switcher.exe tool. |
| Ports appear but no internet | Missing NDIS driver or APN | Reinstall driver, then set APN manually in network settings. |
| Driver installation hangs | Previous driver conflict | Use ZTE Driver Cleaner tool or manually delete old drivers via Device Manager (show hidden devices). |