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Welcome to the Fitbit community, @andykey75!
I assume you're having issues getting phone calls on your Sense 2. If so, please make sure your phone meets Fitbit's current system requirements:
If it does, you might want to have a closer look here for everything you need to know to set up and handle on-wrist phone calls on your device:
How do I take on-wrist phone calls with my Fitbit smartwatch?
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