Sense 2 not pairing to Samsung S21

[GrannyAdams]

Today I stopped receiving phone notifications on my Sense 2. I've tried restarting the phone, restarting the watch, deleting and reinstalling the app, turning Bluetooth off then on again, deleting the watch from the app and attempting to add it again. Now Bluetooth on my phone cannot even find the Sense 2, though I can pair the watch to my tablet, and can pair other things to my phone. I don't know what else to try.

Moderator edit: clarified subject.

[ManuFitbit]

A warm welcome to the community forums @GrannyAdams. 

Thank you for providing the information about this difficulty with your Sense 2. 

While reviewing your information I've been informed that you already contacted the Support Team for further assistance with this. In this case, they will let you know how to proceed. Please keep in contact with them and take a look at your inbox. 

[GrannyAdams · Accepted solution]

Follow up—-I contacted Fitbit customer service. They had me repeat evrything I had already done. Eventually I did a factory reset, which fixed the issue. The reset also forced the watch to do an update. NOTE: it’s important to sync the watch before performing the rest, to be sure no data is lost.