Bluetooth can't connect/won't sync flex

[FitCassie]

My fibit flex hasn't won't sync. The Bluetooth occasionally can find it but says unable to connect to fitbit. Other times it's not listed as a device nearby

It will update parts (steps, calories), but not distance, miles or sleep. It frequently says cannot sync.

I've tried signing out of the app. Uninstalling and reinstalling the app. Resetting the fitbit with a pin and had all 4 lights flash. It's charge. I restarted my phone, the app is up to date.

I don't know what else to do. Help please?

[AlejandraFitbit]

A warm welcome to the Forums @FitCassie. Thanks for troubleshooting this inconvenience by yourself. I recommend following our syncing troubleshoot, after these steps your tracker should sync without an inconvenience. Also, check if your phone is a compatible mobile device.

I hope this helps, let me know the outcome. 

[FitCassie]

Thank you for your response Alejandrate.
I've attempted the syncing troubleshootso as well.

My app is up to date.
When I turned bluetooth on and off it acknowledges my fitbit but when I attempt to conntect, it states "pairing rejected by flex".
I've restarted the fitbit and my mobile device and forced a sync.I have a Samsung S5 neo and have not had problems with the app syncing on this device before.
I've Uninstaller and reinstalled the app. Do I need to create an entire new account?

[AlvaroFitbit]

@FitCassie It seems that you are trying to pair your tracker via your phone's bluetooth settings area since you will get that message there. The setup should be done through the Fitbit app and you can follow @RobertoME's instructions here to do so.

Let me know how it goes!