You can get the answer to that question by reading the section of the article headed with "Cause #2", or from this page: https://help.fitbit.com/articles/en_US/

You can get the answer to that question by reading the section of the article headed with "Cause #2", or from this page: https://help.fitbit.com/articles/en_US/Help_article/2134 https://help.fitbit.com/articles/en_US/Help_article/2134 Disclosure: #fitbitemployee but speaking only for myself.