Charge 2 not syncing with iPhone 5S

[maurosnotthatfi]

i own a fitbit Charge 2. i didn't sync it with my iPhone 5s for like a week and a half and when two days ago i tried to, it didn't work. i managed to sync today but i basically lost a week and a half's worth of data, as the app only collected today's data, which isn't even all of it.

the app is updated and i run iOS 11.3 beta 2. i tried restarting the phone AND the fitbit, still doesn't work. i tried logging in on another device (android this time), and it synced today's data and then it didn't work anymore as well. my iphone used to say the fitbit's "connected" in the settings but now it doesn't even show up in the devices list anymore. i tried turning the bluetooth on and off and didn't work. i tried to re-connected my fitbit to the phone and for the first two times it would give me the message "time's out" while trying to connect from the screen that requires to type in the number shown on the watch screen.

did i break it because i seriously think i followed any list on fitbit's com

Moderator Edit: Clarified Subject.

[MarcoGFitbit · Accepted solution]

Hello @maurosnotthatfi, thanks for joining the Fitbit Community, it's great to have you on board. 

Thanks for bringing this situation to my attention and for letting me know with great detail the troubleshooting steps you have already tried in hopes to resolve this issue, I really appreciate it. Now that you have restarted your tracker and your phone, I would like to suggest you to check the following before attempting to set your tracker as a new device again:

• Make sure you have a strong WiFi signal
• Make sure there are no other Bluetooth devices around as they might interfere with the setup process.
• Plug in your tracker and make sure it's charging.

Then, let's try adding your tracker as a new device, hopefully after checking the previous points you will not receive the "Time's out" error:

1. Open the Fitbit app and tap on the Account symbol at the top right corner of the screen, then tap on "Set up a New Device"
2. Choose your tracker and follow the onscreen instructions to continue
3. When the app asks you to replace your current tracker, please replace it and continue with the process.
4. When a pop-up appears asking you to Pair your tracker to your device, tap on Pair and continue.

When you tap Pair on the pop-up at the end the tracker will establish a Bluetooth connection with your phone and you will now be able to see it under the list of paired devices in your phone's Bluetooth settings. 

I hope this can be helpful, give it a try and keep me posted in case you need anything else.