My Fitbit 3 has the same problem. I have been searching for guidance for over 6 months and can find no help at all. The recommendations of turning it off and pressing the side button fir 6 seconds made no difference. Now I can only ever see the centre of the screen. The two edges never display. I am extremely disappointed in the visual performance of my Fitbit. I love the technology feedbacks but I am now researching a different make as I can find no advice and don’t want to risk buying another to experience the same thing again after just 2 years.
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