Anneli on Twitter: "@FitbitSupport @FitbitUK what does the smiley face mean? Suddenly my fitbit charge 4 is not turning on but if I hold down the power button for 15+seconds I get
Solved: Charge 3 has white lines across the display - Fitbit Community
Charge 3 Issues - Fitbit Community
How to reset the Fitbit Charge 3: Restarts and resets - NEWSTARS Education