01-14-2016 01:03
01-14-2016 01:03
01-14-2016 01:48
01-14-2016 01:48
Before sending back it's worth trying a restart:
http://help.fitbit.com/articles/en_US/Help_article/How-do-I-restart-my-tracker/
This does no harm and can sort out all sorts of issues.
Note that it doesn't always work first time so give it a few tries.