I don't know if it's the app on my phone or the Fitbit One. It constantly says cannot find device. I've deleted the app and reinstalled it. I keep restarting the One. Nothing helps. Do I need a new Fitbit? I like being able to put it in my pocket. I don't want to wear it on my wrist. Any suggestions? Or is it just a problem with the app and it will eventually resolve? Anyone else having this problem?