How to operate the handheld device? Press the [Small Button] from [Left Side] of the device. 1. Insert SIM card into device. 2. How to [Insert / Replace] paper roll. “Open” the front orange colour cover.Place a new roll of thermal paper. 3. How to Power [ON / OFF] device. “Long Press” to Power ON.“Long Press” to Power OFF. 4. How to put device into [Sleep Mode]. Press the [Small Button] from [Left Side] of the device. 5. How to check is the device activated? “Swipe Down” from the top of the screen, make sure [SIM] indicator is activated (Orange Color). 6. How to charge the device. Use USB Type-C charger to charge. 7. Make sure there’s “Signal & Battery”. 8. Press RadiCON icon to login. 9. How to manual update the app? Open [App Store].Press [RadiCON].Press [Update].It’s done. 10. How to [Close / Kill App]. Press the [Square] button on the navigation bar.“Swipe Up” or press [X].It’s done. 11. How to [Uninstall] RadiCON app? “Press & Hold” on RadiCON app icon.“Drag” the icon to [Uninstall].It’s done. 12. How to [Install] RadiCON app? Open [App Store].Press [RadiCON].Press [Install].Press [Auto Setup].It’s done.