Check your mobile device is compatible, ensure your card reader and mobile device are charged and check your SumUp app is updated.
Reset your card reader's Bluetooth
If your device is compatible and card reader is charged, but you still can't connect, try resetting your connection.
Turn your phone or tablet's Bluetooth off.
Close the SumUp app on your device.
Make sure your card reader is not charging. Then hold the reader's power button for approximately 3 seconds until it turns off.
Press and hold down the power button again until you see "Release for BT" on the display and hear a beep. Then release the power button.
Wait for a second beep and then manually reconnect your device.
If your Bluetooth connection still won't work, try restarting both your card reader and the device you're trying to connect to.
If connecting to a phone or tablet, you can also try clearing your Bluetooth app's cache in your phone or tablet's settings.
Your device may be defective or blocked. Find out what to do with defective card readers.