Charge 3 won't sync

[Sazzal]

My Charge 3 over the last week is constantly failing to sync. It takes 5 or 6 goes and repeatedly opening and shutting the app to get it to work. It’s also started randomly buzzing for about 10 secs a couple of times a day and sometimes the screen doesn’t respond. 
move tried reinstalling the app and it’s made no difference. 
help!

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there @Sazzal, welcome to the Community Forums. I'm sorry to hear that your Charge 3 is not syncing to your phone, I understand where your concern is coming from and how you must be feeling. Thanks for the details provided in your post and for trying to solve the issue prior to posting here. I'll be glad to help you with this.

If you haven't done so yet, please try removing the Bluetooth connection between your phone and your Fitbit device:

*On your phone, tap Settings > Bluetooth > the information icon next to the name of your Fitbit device > Forget This Device.
*Open the Fitbit app and set up the connection again. You should receive a message asking you to allow your Fitbit device to pair with your phone. Tap Pair to approve the request.

Sync your tracker automatically when you open the Fitbit app or manually by tapping your profile picture > your device tile > Sync Now. If your Charge 3 doesn't sync, follow the troubleshooting provided in this help article: Why won't my Fitbit device sync? 

As for the Charge 3 behavior, I'd recommend restarting it by following these steps.

I'm looking forward to your response, let me know if you need further assistance. 

[linoxyn]

I came across major sync issues with Charge 3 after the firmware update. I have a Samsung S6. After a few weeks I contacted support and followed their trouble shooting steps, I was offered a discount off my next purchase! The problem is that support cannot deal with your phone only your Fitbit device and their App. I have fixed this issue myself! I believe the biggest issue is data retention within the Apps - Bluetooth and the Fitbit. On the phone go to your Settings/(system)Apps/Bluetooth. In the Bluetooth settings clear all data, cache and storage data. Then 'force stop' the app. Shut down the phone and restart after a few minutes. If this doesn't work, which it didn't for me continue with also clearing the cache and storage data for the Fitbit App and the uninstalling the app. Follow the Bluetooth steps again above. After you turn your phone back on install the Fitbit App from the store. Then open the Fitbit App and follow the prompts. It will ask you to turn on Bluetooth and then follow the steps to connect your device. If this fails, which it did for me! You will need to go to the Settings/About/Clear User Data  on your Fitbit. Yes, this removes all your data and tracking. I'm not sure, though your web login account may hold this data, and you may be able to retrieve it? Now, follow the Bluetooth instructions again... When you restart the phone and log into your Fitbit App all should go perfectly well. This did it for me... now I have my device back and it and the app work better than ever! Syncing is no longer an issue 🙂