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What does the display message “Signal Loss Alarm” mean while wearing a FreeStyle Libre 3 Plus sensor?

A “Signal Loss Alarm”* means that the sensor has not automatically communicated with your device in the last 20 minutes.

Check that your Libre app** or FreeStyle Libre 3 app on your smartphone is within 33 feet of the sensor.

If you continue to see a “Signal Loss” message please contact Customer Care which is available at 1-855-632-8658 7 days a week from 8AM to 8PM Eastern Time; excluding holidays.

* Alarm notifications will only be received when alarm settings are enabled and the sensor is within 33 feet (unobstructed) of the reading device.

** The FreeStyle Libre systems apps are only compatible with certain mobile devices and operating systems. Please check the Support section of our website for more information about device compatibility before using the apps. Use of the FreeStyle Libre systems apps may require registration with LibreView.


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