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Here are some suggestions on troubleshooting this:
-Try Restarting your phone. - When I have issues syncing, it's usually my phone and not the fitbit. Once it restarts, turn the bluetooth on and off to make sure it's pairing properly.
-If that does not work, please restart your fitbit.
https://help.fitbit.com/articles/en_US/Help_article/1186
Please let us know if this worked out for you.
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