- Make sure you've activated the Bluetooth of your mobile device.
- Make sure your BPM+ is not already paired and connected to another smartphone.
- If you are using your BPM+ with a different smartphone than the last smartphone connected, you have to:
- Disable Bluetooth on the other device.
- Go to the Bluetooth settings of your device and tap the name of your BPM+ to connect it.
https://support.withings.com/hc/en-us/sections/6215920350481-BPM
https://support.withings.com/hc/en-us/sections/115002570648-Troubleshooting