A: Ensure you have installed the Allwinner Drivers included in the pack. Try a different USB cable or a different USB port on your PC (avoid USB hubs). Make sure you are holding the FEL button correctly before plugging in the cable.
button several times (typically 3–10 times) until the computer recognizes the device and the flashing progress bar starts Essential Resources on 4PDA phoenix usb pro 4pda link