I have had my fitbit charge 3 since 2019, I believe. For the last month or so it won't sync. I've done all the suggested tips to fix it and it won't sync. I've rebooted my fitbit, I've deleted the app and re-downloaded it, I've forced the app to stop, I've turned blue tooth off and on, restarted phone, checked permissions in apps and settings, made sure my phone was updated and I unpaired it and tried to pair it again and now it won't pair. I even have premium...but can't use it. 😡