I have a flex 2 and it often won't sync. Normally I just reset the Fitbit on the charger, and previously I have had to turn off Bluetooth on my phone, neither are working this time, flashing lights aren't happening when reset on charger! Help!
Best Answer
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Fitbit Product Experts Alumni are retired members of the Fitbit Product Expert Program. Learn more
That doesn't sound good - the restart is usually a good bet ... and there's not a lot else to try!
There are a few suggestions in this troubleshooting guide:
http://help.fitbit.com/articles/en_US/Help_article/1866
If you still can't sync after that then while you are waiting for further suggestions you may want to contact customer support to see if they can see what's happening from the server side: