Dexcom Clarity App Not Syncing — Bluetooth Connection Fix

Hello. If your Dexcom G7 or G6 is not syncing with the Dexcom app or Dexcom Clarity, or if you are seeing connection warnings, this guide will help you get your CGM data flowing again. Step 1: Understand how Dexcom syncs. The Dexcom G7 transmits readings directly to your phone via Bluetooth Low Energy every 5 minutes. The Dexcom G6 transmits from a separate transmitter clipped onto the sensor. The Dexcom app and Dexcom Clarity are two separate apps — the main Dexcom G7 app displays real-time readings, while Dexcom Clarity is a reporting app that syncs your data to Dexcom's cloud servers. Step 2: Check phone Bluetooth permissions. On iPhone, go to Settings → Bluetooth and make sure Bluetooth is on. Tap your phone's name for the Dexcom device and verify it is connected. On Android, go to Settings → Apps → Dexcom G7 (or G6) and check that Location and Bluetooth permissions are set to "Allow." Step 3: Check that the Dexcom app is allowed to run in the background. Aggressive battery optimization on Android is the number one reason Dexcom apps stop syncing. Go to Settings → Battery → Battery Optimization, find the Dexcom app, and set it to "Unrestricted" or "Not optimized." On iPhone, go to Settings → General → Background App Refresh and make sure it is enabled for the Dexcom app. Step 4: Force-close and reopen the Dexcom app. Swipe the app closed completely, wait 10 seconds, and reopen it. The app should reconnect to the sensor within 1 to 2 minutes. Step 5: If the G6 transmitter is not connecting — check transmitter pairing in the app. In the Dexcom G6 app, go to Settings → Transmitter and verify the transmitter ID listed matches the ID printed on your actual transmitter. If you recently replaced a transmitter, you must enter the new transmitter ID in the app before it will pair. Step 6: For Dexcom Clarity not syncing — check internet connection. Clarity uploads to Dexcom's cloud servers. If your phone has no internet access or is in airplane mode, Clarity will not upload data. The data is stored locally and will upload automatically when internet access is restored. Step 7: Reinstall the Dexcom app only as a last resort. Reinstalling will not affect your active sensor session for the G7 — the session is stored on the sensor itself. For the G6, do not reinstall unless your session has ended. Contact Dexcom support at 1-888-738-3646 before reinstalling if you are mid-session. Step 8: Check phone compatibility. Dexcom publishes a compatibility list at dexcom.com/compatibility. Older phones running outdated Android or iOS versions may lose Bluetooth stability. If your phone is more than 5 years old, consider upgrading or using the dedicated Dexcom receiver device. Still need help? Find a CGM provider near you →