: Many users report a "yellow triangle" in Device Manager when connecting via USB 3.0. A common fix is to use a USB 2.0 port or disable the 3.0 controller on your PC.
Before updating, identify your firmware: zte mf910 firmware
Are you looking to your device for a different carrier, or are you trying to update to a specific version for a performance fix? : Many users report a "yellow triangle" in