If your Fitbit Alta or Alta HR won’t sync, won’t turn on, or doesn’t respond to your taps, it might be time for a reset. Learning how to reset your Fitbit Alta can fix most of these issues and prevent you from losing your data.
Resetting your Fitbit Alta only takes a few seconds. All you need is your charging cable and your Fitbit Alta.
Connect the charging cable to your Fitbit Alta.
Press the small round button on the bottom of the charging cable three times within a few seconds. After the third press, you will see the Fitbit logo appear and the Fitbit will restart.