Charge 3 replacement won't sync

[haarisfazili]

My fitbit charge 3showing a grey lines and then stopped syncing. I got a new charge 3 but that just does not sync. Very disppointed, I've tried all the trouble shooting steps

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there @haarisfazili, welcome to the Community Forums. I'm sorry to hear that your Charge 3 replacement is having syncing difficulties, I understand where your concern is coming from and how you must be feeling. I appreciate you've already tried troubleshooting your tracker prior to posting here, I'll be glad to continue to help you.

I'd recommend following the troubleshooting steps provided in this help article: Why won't my Fitbit device sync?. What phone are you syncing with? Please know Fitbit products are compatible with most devices that have the following operating systems: Apple iOS 12.2 or higher, Android OS 7.0 or higher, and Windows 10 version 1607.0 or higher. For the latest list of devices that support the Fitbit app for Android, see Which phones and tablets can I use with my Fitbit watch or tracker?

Please keep in mind that when a device is not supported and does not meet the require OS we cannot guarantee its functionality with the Fitbit app. It might work at a certain time and then it can stop working out of nowhere after an update. This is because the app is not optimized to that device and any change could impact the performance. 

We routinely test new devices to ensure full compatibility with Fitbit devices and the Fitbit app, and are constantly working to confirm compatibility with new phone models. Be sure to verify that your phone or tablet meets the minimum operating system requirements.

Let me know if you need further help, I'll be around. 

[haarisfazili]

I'm using the OnePlus 7T and I've followed your instructions but it still
doesnt sync!