1.First of all, Please plug in the U-Disk or other usb external disk which include upgrade file into USB Host port of Bollo nmp-mob, then enter the "SETTINGS" menu;
2. In the System Setting menu, choose Upgrade option and press "OK" button to execute it;
3. The system will find out the USB device on the USB Host port, and show up the device name. Choose the device and press "OK" button to browse the device;
4. Select a correct upgrade file in your USB device, and press "OK" button to execute upgrading
5. After upgade finished, the player will reboot automatically. If the automatic reboot failed, please power off the player and restart it.
6. The upgrade procedure finished.