Bought "new" charge 4 limited edition but can't connect

[Costar]

I bought a "new" fitbit charge 4 because my other doesn't show the screen anymore. It was om marktplaats ( kinda like Craig's list) .. Fist one didn't connect , 2nd one he kindly replaced the 1st . Doesn't connect righter.  stops at this screen .. 100% and Bluetooth restarted several times as the watch. Help or is it a lost cause? 

[Odyssey13]

Hi @Costar  more than likely, it's a lost cause. Fitbit has the Charge 6 now and no longer sells the Charge 4. It would need firmware updates and those usually stop two years after the last date it was made. Sorry this happened to you. Sometimes it works out buying from someone else and sometimes it doesn't,

[LZeeW]

@Costar   Just to be complete, it's possible that they are counterfeit devices.