Phone not found-launch Fitbit app' instead of using GPS-Charge 3

[LSmith628]

I rebooted my Charge 3 after it was performing slowly - now it will not connect to my phone when exercising.

It will sync all data, and still connect to the fitbit app but if I select an exercise it just says 'phone not found - launch fitbit app' instead of using GPS.

I have re-paired them, I have deleted and reinstalled the app, I have rebooted the device again and I'm out of ideas.

GPS and Bluetooth is enabled on my phone.

Screen is also very unresponsive and the fitbit must go black and rewake up to update anything selected on screen. 

Only had it for 8 months, pretty poor.

Moderator edit: updated subject for clarity

[EdsonFitbit]

Welcome to the Fitbit Community @LSmith628.

Thank you for the information provided and for trying to resolve the issue with your Fitbit Charge 3 before contacting us.

Whether your phone settings for location for the Fitbit app are set to Allow when app is in use, please change it to Always allow.

In addition, you can perform a long restart by following the next steps:

1. Connect the device to the charging cable. 
2. While the device is plugged into the charging cable, press and hold the button down for 15 seconds. 
3. The device turns on and shows a battery icon. Two vibrations occur: first a short vibration, then a medium vibration. 
4. The device turns off.
5. The device turns on and shows a progress bar and short vibrations occur. The progress bar completes. Note: A total of 7 short vibrations occur. 
6. Remove the device from the charging cable. The device shuts down.
7. Important: Plug the device into the charging cable again.

If you have any question, please let us know.