Which phone do you have and is it on the list of compatible devices? click to see
You try anything here on the article for trouble syncing? see if any of this helps - click to read
Best AnswerMy flex 2 has stopped syncing with my phone. I've reset the Bluetooth connection, restarted my flex 2, deleted and reinstalled the app, restarted my phone. Nothing. I believe my iPhone was recently updated to a new iOS, but I don't remember if it was yesterday when it stopped syncing.
Hi @afilla be sure your phone meets the minimum requirements, too. Link is in my post above.
Best Answer