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SPECIALTYMEDICAL EQUIPMENT

Dexcom G7 · FreeStyle Libre 2 & 3

CGM Signal Loss & App Pairing Problems

Quick Answer

Signal loss usually means your phone or receiver is too far away, Bluetooth or app permissions are off, or something is blocking the signal. Keep your display device within about 20 feet, confirm Bluetooth and notifications are on, and restart the app before replacing anything.

Quick checks

  1. Keep your phone or receiver within about 20 feet with no obstacles. Sleeping on the sensor or keeping your phone in a back pocket can block the signal.
  2. Make sure Bluetooth is on and the app has permission for Bluetooth, location (Android), notifications, and background activity.
  3. Turn off battery-saver or low-power modes that close the app in the background.
  4. Confirm your phone and operating system are on the manufacturer’s compatible-device list — an OS update can change this.

If readings still don’t appear

  1. Wait — signal loss often clears on its own within 30 minutes. Your sensor keeps recording and many apps backfill missing data.
  2. Close and reopen the app, then restart your phone.
  3. Don’t delete the app or unpair the sensor unless the manufacturer tells you to; this can end the current sensor session.
  4. If you use both a receiver and a phone, check whether the reading shows on one but not the other to narrow down the problem.

Pairing a new sensor

  1. Enter the pairing code or scan the sensor exactly as the app instructs — for Dexcom G7, the code is on the applicator.
  2. Stay close to your phone during the warm-up period.
  3. Medicare members: keep using your Dexcom receiver or Libre reader at least part of the time — Medicare coverage requires the durable display device to be used.

When to call us

  • Signal loss lasts more than a few hours after these steps.
  • Your app shows a sensor failed or needs replacing.
  • Your receiver or reader won’t power on or charge — call us so we can check your coverage for a replacement.

General guidance only, not medical advice. Always follow your device’s user guide and your prescriber’s instructions. For urgent symptoms of low or high blood sugar or trouble breathing, call 911.

Manufacturer resources

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