Hello @GKsarath welcome to the Community Forums, thanks for bringing this to my attention. It's a pleasure for me to assist you with the inconvenience experienced with your Fitbit.
I appreciate all the details that were shared in your post. If you haven't already done so, I recommend you to check all the information that's specified on: How do I set up my Fitbit device? to check if all the requirements are correctly configured to setup your device. Then, you can move forward to the troubleshooting steps that are specified on: Why can't I set up my Fitbit device? and let me know how it goes.
Please make sure that your mobile device is compatible because due to a compatibility concern you can experience connection difficulties.
Keep me posted.
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