If you are not getting calls or messages from your Samsung galaxy S8 or 8+ to your fitbit blaze....just go to settings, choose notifications, turn off (ALL Apps) only choose individually messages and contacts. This should work after pairing your two devices first of course.
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Thanks for becoming a member of the Community @Arnetta.
That is very good suggestion. Thanks for sharing your experience and what worked for you. I will be sure to lead other users to your post whenever it could be useful for them.
Feel free to reach out to me if you have any questions.