If you need to update the Wi-Fi network your Smart Kid Scale uses, you have to dissociate the scale from your account and then reinstall the scale from scratch. To do so, perform the following steps:

1. Open the Baby Companion app.
2. Open the menu and tap Settings.
   
3. Tap Withings Kid Scale.
   
4. Tap Associated scales.
   
5. Tap Remove this scale.
6. Tap Remove from my account.
7. Reinstall the scale.