Here is a list of steps you can try while setting up your Withings Activité: 1. Close the app and open it again 2. Make sure your Withings Activité is close enough to your iOS or Android device 3. Make sure your Withings Activité vibrates when you press the reset button with the tool provided with the watch. If it doesn't work, remove the case and try pressing the button again. If the watch vibrates, put the case back while making sure the button is aligned with the hole. If the watch still doesn't vibrate with the case off, try replacing the battery 4. If nothing else works, perform a factory reset of your Withings Activité by pressing the reset button five times. You need to let your Withings Activité vibrate each time you press the button. After pressing the button five times, your Withings Activité should vibrate twice. Make sure you "forget" your device in the Bluetooth settings of your smartphone