The synchronization is easy and automatic. Once you receive your reader, download the Sumup app on the same mobile phone where you have Smart TD. Start the session in the Sumup APP. To do this, use the username and password that you defined when you registered on your website. Enter an amount (with a minimum of € 1) and press “Perform Charge”. Your smartphone will automatically search the reader by Bluetooth, activate it and request the link. Check the serial number that appears on the screen with that of your device and click on “Connect”. Finally, accept the link from the device by pressing the green checkmark. Linked!