Hi there @Kali_Bridges, good to see you have joined the Fitbit Community. I've heard about the new Samsung 8+, however note at the moment this phone is not yet listed as compatible. With this it does not mean it wont work. The difference is that we cannot guarantee all feature or if the phone will be compatible.
If your device isn't listed, you can check the link of Compatible Devices at a later date to see if device support has been added.
In the meantime it wont hurt to try the following post: Having trouble syncing? (here's how to fix this), specially the part of the requirements for Location Services.
For more helps the following video will guide through the setup process.
See you around and hope this helps!
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