To update your device's firmware, perform the following steps:
- Open the Withings App.
- Tap your Devices in the upper right.
- Find your device and scroll down to "Advanced Settings"
- Tap Check for updates.
- Wait until the update is complete.
- Tap Done.
https://support.withings.com/hc/en-us/sections/6212651181969-Smart-Body-Analyzer
https://support.withings.com/hc/en-us/sections/200336167-Maintenance