CGM features and fixes · Dexcom G7

Dexcom G7 alarms not sounding

G7 alerts can be stopped by phone settings such as Screen Time, Low Power Mode, notification settings, or a Quiet Mode in the app. (Dexcom; Dexcom user guide, p. 109)

What the maker says to do

1. Turn on notifications and Critical Alerts for the G7 app in iPhone Settings.
2. Set each alert to Sound in the G7 app at Profile > Alerts.
3. Turn off Screen Time limits for the app, or add it to Always Allowed.
4. Turn off Low Power Mode.
5. Make sure you are not using the Silence All or Vibrate Quiet Mode.

A call when readings stop

Glide sends every phone on the profile a lost signal banner after 30 minutes without a reading, and overnight it can call a phone number you verify (Premium). How the lost-signal call works.

More on the Dexcom G7

• Follower app not updating
• Signal loss
• Sensor error
• Warm-up
• Sensor failed early
• Compression lows
• Follower not getting alerts
• Compatible phones

Alarms not sounding on other CGMs

• Dexcom G6
• Dexcom ONE+
• Dexcom Stelo
• FreeStyle Libre 2 and 2 Plus
• FreeStyle Libre 3 and 3 Plus
• Medtrum TouchCare Nano CGM
• Eversense 365
• Medtronic Simplera
• SIBIONICS GS1

Sources, quoted

• Dexcom: “If notifications for the Dexcom G7 app are off, you won't get any alerts.”
• Dexcom: “Go to your iPhone's Settings Tap Dexcom G7 Tap Notifications Turn on Allow Critic”
• Dexcom: “To allow Dexcom G7 alerts to sound during Do Not Disturb: Open your Dexcom G7 app Tap Profile Tap Alerts Choose "Sound" within each alert.”
• Dexcom: “Turn off Downtime and App Limits, or add the Dexcom G7 app to the Always Allowed app list”
• Dexcom: “When Low Power Mode is on, alerts may be delayed.”
• Dexcom user guide, p. 109: “Quiet Modes: Make sure you aren't using Silence All or Vibrate.”

Every quote is checked against its source page before each update of this site; last checked 2026-10-06. Makers change their apps; the source page is the authority when it differs.