Fitbit One not synching

[HighD]

My One hasn't synched in a few days.

Here's what I've tried

1. Restarted the One

2. Turned off/on Bluetooth on my phone. 

3. Turned off/on wi-fi on my phone. 

4. Checked for updates on phone, Fitbit app, and One.

5. Tried synching on another device. 

Nothing has worked. I think something's wrong with the One. Any ideas?

[Marge32]

It worked beautifully, thanks very much! It's such a pain when the Fitbit doesn't synchronise, and I really don't want a wristwatch so am very happy the One is working again.

[KJScarp]

An app update (3.11 Android) dated 11/18/19 was just pushed to my phone & my One synced flawlessly. Fingers crossed it continues to sync & that future updates won't break the device again. 

[KJScarp]

Well, a day later and I'm getting "Device Cannot Be Found".  It worked perfectly for a day (but drained the battery almost down to nothing in that day, so I turned off All-Day-Sync to try to improve battery life).  I charged the battery last night, and it has failed to sync since then.  I checked the app reviews on the Google Play store, and others are complaining of the same issue - worked for a day and then nothing.  Based on one of the reviews, I rebooted my phone & it synced again. 

I don't understand what's happened to this company.  I've had a One since June 2011 and I've never had so many problems as I've had in the last month.  They really need to get their sh*t together.

[JDP12]

Fully agree. It is extremely frustrating. For a major “player” their product/support on this issue is appalling.

Moderator Edit: Personal info removed

[ShazzyA]

Thank you so much! Followed your instructions & my Fitbit One is syncing again!!

[Iloveeyore78]

So glad it helps everyone!!!!

[savtac]

I have gone so far as to impair it and start over.  This is the 3rd time I have been through this... last time it took 3 weeks. Totally frustrated!

Moderator Edit: Formatting