Before updating, please make sure that your DiamondClean Smart Toothbrush is charged for at least 15 minutes to ensure a successful installation of the new firmware. Use the following steps to update the firmware of your toothbrush 1. Install the latest version of the Sonicare App 2. Turn on Bluetooth on your smartphone 3. Open the Sonicare App 4. Turn on your toothbrush by taking it off the charger or by pressing the mode button 5. A notification will tell you that a new firmware update is available 6. Follow the in-app instructions to update the firmware of your toothbrush. If this did not work, try to manually update the firmware of your toothbrush.