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Error 400 for initial set up

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I cannot get past the sync set up on the flex. I’ve cleared my Bluetooth, added/deleted app, fully charged device, turned phone on/off...all the things previously recommended. Any other insight?

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May I ask which Fitbit model you have @Mmueller, and which phone you are seeing the error on?

You have posted in the Flex board and it has been 5 years since they where made. 

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It’s a 10r or Xr

Sent from my iPhone
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