Fitbit Alta not syncing and time changed

[Clarabell1]

Hi, my Alta has suddenly changed the time. It’s out by several hours. It has also stopped syncing at the same time. I have reset the Alta via button on charger. Deleted app and reinstalled, turned phone on/ off, switched Bluetooth off and on. Any suggestions please? 

[MarcoGFitbit]

Hello @Clarabell1, have a warm welcome to the Fitbit Community, it's great to have you on board. 

Thanks for bringing this to my attention and for letting me know the troubleshooting you've already tried in hopes to resolve the syncing issue affecting your Alta. At this moment I would like to suggest you the following:

• Make sure the latest version of the Fitbit app is installed on your phone.
• The software on your mobile device is up to date. To check, tap Settings > General > Software Update.
• Make sure there are no other Bluetooth devices around as they might interfere with the syncing process
• Check that your Fitbit device's battery isn't critically low.

If your device still won't sync, try these steps in order:

1. Force quit the Fitbit app. 
2. Go to Settings > Bluetooth and turn Bluetooth off and back on once again.
3. Open the Fitbit app.
4. If your Fitbit device didn't sync, restart your phone again.
5. Open the Fitbit app.
6. If your Fitbit device didn't sync, restart it one more time.
7. If your Fitbit device won't sync after the restart, log in to your Fitbit account on a different phone, tablet, or computer and try to sync.
8. If your Fitbit device still doesn’t sync, remove all other Fitbit devices from your account and from the list of connected Bluetooth devices on your mobile device and try to sync.

I hope this can be helpful, give it a try and keep me posted in case you need anything else.