1. Choose other country to get service

      How to perform the software update? Via internet – if applicable.

      1. Create a new folder in the USB root directory, rename it to P73XX_UPG, then copy the upgrade bin file to the folder.
      2. Switch Sbar source to USB. Color(Cyan);
      3. Plug in the USB, the system will automatically upgrade, and it will automatically restart after the upgrade. 

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