Welcome to the Forums @Wmcc.
This might be happening because the Stylo 3 is not part of the supported devices list. This means that the app has not been fully optimized to work with that phone.
As long as it fulfills the minimum requirements, Android 4.4 and Bluetooth 4.0, there is a possibility that it can work but we cannot guarantee it. Some users of unsupported devices have mentioned that following these steps helps with the syncing.
If none of the above works, you could try to use a computer or another mobile device to try and sync your Fitbit to your account. Click here to get instructions on how to sync with other devices.
In the meantime, you could support this suggestion to add the Stylo 3 to the list. You can vote for it or comment on it to show your support for the idea. Be sure to read the FAQ if you have any questions on how that board works.
Let me know if you have any further questions.
Lanuza | Community Moderator Remember to vote for posts that helped you out! Tired of the same workout music? Try a Podcast! 🙂
Community Moderators ensure that conversations are friendly, factual, and on-topic. We're here to answer questions, escalate bugs, and make sure your voice is heard by the larger Fitbit team. Learn more
Best Answer