This is almost always a driver issue. Ensure Windows is running with driver signatures disabled. Open Device Manager, look for items with a yellow exclamation mark, right-click them, and manually point the driver update tool to your extracted ZTE driver folder.
Select the correct COM port that matches your device's diagnostic port.
Before attempting to flash or update the firmware to a "no brand" version, ensure you have the following: zte mf90 firmware no brand
The is a popular 4G LTE mobile hotspot (MiFi) known for its solid performance, Category 4 LTE speeds (up to 150 Mbps down), and support for multiple bands. Originally distributed by carriers like Telstra, Bell, T-Mobile, and others, many MF90 units come with branded firmware — customized by the carrier with specific APN settings, logos, feature restrictions, and UI modifications.
If your device is already unbranded or you have the correct file, follow these steps to update: Access the Admin Page : Connect your PC to the This is almost always a driver issue
Follow the on-screen instructions precisely. The tool will replace the existing carrier-locked firmware with the generic version.
To rewrite the system partitions, the device must switch from network sharing mode to diagnostic mode. Select the correct COM port that matches your
: Use diagnostic tools to save your original IMEI and calibration data before writing new files. Step-by-Step Installation Guide Step 1: Put the Device into Diagnostic Mode
Double-check your Windows Device Manager. This is almost always caused by a missing driver or a faulty USB cable. Ensure Windows Driver Signature Enforcement is permanently or temporarily disabled, then reinstall the ZTE drivers. Missing IMEI (Null/0000...) after flash
