Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hello @nannadanna, have a warm welcome to the Fitbit Community, it's great to have you on board! 
I appreciate your participation in the Forums and for reporting this to us. I appreciate you have already tried to set up your Alta HR several times and at this moment I would like to suggest you to try the following:
- Turn off Bluetooth on your phone; wait 10 seconds, and then turn it back on.
- Make sure you have a strong WiFi signal and that there are no other Bluetooth devices around that might interfere with the setup process.
- Restart your Charge 3
- If you can't set up after a restart, reboot your phone or tablet and try to set up again.
- If you can't set up after the reboot, remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your phone or tablet and try to set up the Charge 3 one more time.
I hope this can be helpful, if there's anything else I can do for you, please feel free to reply.
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Community Moderator Alumni are previous members of the Moderation Team, which ensures conversations are friendly, factual, and on-topic. Moderators are here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Hello @nannadanna, I hope you're doing well, thanks for taking the time to reply.
I appreciate you have come back and let me know you've tried the troubleshooting steps provided earlier and your tracker is still not syncing. At this moment, my best recommendation would be setting up your tracker as a new device. This will reset the connection between your tracker and your phone.
To set up your tracker as a new device:
- Go to the Bluetooth settings on your phone and check if your tracker is on the list of paired devices. If it is, tap on it and select Forget this Device.
- Open the Fitbit app and tap on the Account symbol at the top right corner of the screen, then tap on "Set up a New Device"
- Choose your tracker and follow the onscreen instructions to continue
- When the app asks you to replace your current tracker, please replace it and continue with the process.
- When a pop-up appears asking you to Pair your tracker to your device, tap on Pair and continue.
I hope this can be helpful, give it a try and let me know the outcome!
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