: Always run driver installers with administrative privileges to avoid permission-based failures.

If the device shows up with a yellow exclamation mark in your Device Manager, follow these steps:

| ZTE Modem Series | Windows 11 | Windows 10 | Windows 7 | Linux (CDC ACM) | |------------------|------------|------------|-----------|------------------| | MF79U / MF79V | Native (22H2+) | Yes (v2.0.8.5) | Yes | Yes | | MF833 (4G+) | Yes (in-box) | Yes (v2.0.6.0) | Manual install | Yes | | MF971 (4G Router)| USB mode only | Yes (v2.0.9.0) | Not supported | Yes | | MF626 (Legacy) | No (unsigned) | With disable signature | Yes (v1.0.0.2) | Via usb-modeswitch |

After downloading, use PowerShell Get-FileHash to compare with official MD5 if provided.

By following this guide, you have not only fixed a device error—you’ve gained expert-level insight into how mobile broadband actually works inside Windows.

: Choose "Browse my computer for drivers" > "Let me pick from a list of available drivers on my computer" .