What number did you use, my Flex went south over the weekend. I have had it since March, all I can get is 4 blinking lights I have reset it several times with no luck.
I have 2 of them the flex and the one. I can't wear anything on my wrist at work because I work in a food facility, so I use the one there. I use the flex at the house when I am off, the main difference is the flex doesn't have the altimeter in it so I don't know how many floors I go up in a day.