Hello there @Marji1, welcome aboard to the Fitbit Community! I saw you were having issues at the moment to sync. My apologies for the late response and since it has been a few days after your post, I'm wondering how it goes? Is the issue still persisting?
Make sure your tracker has enough battery charge, otherwise it might present some issues due to the charge is not enough, specially if you are trying to pair your watch back to your account. You did good in trying the troubleshooting steps on your own, so as a matter of review take a look at this help article: Why can't I set up my Fitbit device?
Also make sure your phone is listed as compatible. The full list of compatible devices with confirmed compatibility can be found at fitbit.com/devices. A majority of Android phones running version 4.4 or higher will work with our products, however we cannot guarantee optimal performance on devices for which we have not tested and confirmed compatibility.
See you later and hope this helps.
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