If your Fitbit won't sync with your iPhone, Android, PC, or Mac, you can try these simple fixes to connect your devices.

Make sure Apple Watch and old iPhone are updated and synced to iCloud > back up old phone > set up new phone. When asked to use Apple Watch, select Continue > keep devices close > follow on-screen ...

Get reconnected whether you have your old phone or not This article explains how to pair and connect your Apple Watch to a new iPhone. Follow these instructions to connect and pair your Apple Watch ...