Dexcom not connecting? Troubleshooting checklist

Run through these checks. They solve most Dexcom connection problems.

1. Is there at least one follower in Dexcom Share?
   This is required. Check the Share button in the Dexcom app. Follower access sometimes resets on a new phone.
2. Are you signing in with the main account?
   Use the account that has the follower set up, not a parent's separate monitoring login and not a Dexcom Follow account.
3. Is a phone-number username formatted correctly?
   It needs the + and country code, no spaces or dashes. This often comes up after switching to G7.
4. Does the login work on Dexcom's own site?
   Try it at uam1.dexcom.com (US) or uam2.dexcom.com (most other countries). If it fails there, the problem is with the Dexcom account itself.
5. Is it the same Dexcom account?
   Some people have two. Compare the profile page in the Dexcom app with the account you're signing in with.

Still stuck? Email us or use the support page in the app.

Back to the Dexcom setup guide

Last updated 2026-10-12