1.Please unplug all the wires and then reconnect the head unit.
2.Please download the update.zip via your computer/laptop.
3.Please make sure to format the USB drive(FAT32 Format)/SD card before copying the update file to it.
4.Please ONLY put update.zip file in the root directory of the USB drive/SD card, and then insert the USB drive into the USB cable.
5.Find a pin, press and hold the RST button for 15 seconds to see if you can enter the factory setup page, if you can, select Wipe data/factory reset.
6.After then, insert the USB drive to the USB cable and re-enter the recovery mode > click "Apply update from SD card or USB" > click "from USB storage" > System update.
*Last but not the least, please wipe all the datas before proceeding the update.
