CGM features and fixes · Dexcom G6

Dexcom G6 compatible phones

Dexcom keeps the list of compatible phones at dexcom.com/compatibility and asks you to check it before updating the OS or buying a new phone. The current App Store listings for the G6 app and Dexcom Follow require iOS 18.6 or later. (Dexcom; App Store listing; Dexcom user guide, p. 55)

What the maker says to do

1. Check your phone model at dexcom.com/compatibility before you update the OS or buy a new phone.
2. Update the phone OS manually, then check the Dexcom settings again.

More on the Dexcom G6

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

Compatible phones on other CGMs

• Dexcom G7
• 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: “Please check the Dexcom compatibility chart before installing a new iOS or Android OS version on your smart device and before acquiring a new phone for use with your Dexcom G6 CGM System.”
• Dexcom: “It may take several weeks or more for Dexcom to complete testing on the latest OS versions.”
• App Store listing: “Requires iOS 18.6 or later.”
• Dexcom user guide, p. 55: “Always update manually and verify correct device settings afterward.”

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.