In Device Manager, the device should now appear under "Qualcomm HS-USB QDLoader 9008 (COMx)" or "ZTE Diagnostic Interface (COMx)". No yellow marks.
Enable USB debugging, then in command prompt: zte ftm drivers
In simple terms, are specialized USB drivers that allow a computer to communicate with a ZTE device when it is booted into Factory Test Mode—a low-level diagnostic environment. Unlike standard ADB or MTP drivers, which work when the OS is running, FTM drivers are required when the phone is powered off or stuck in a boot loop. In Device Manager, the device should now appear