Just so you all are away you can dissemble the flex without fully destroying its casing, make a small but deep incision with a sharp blade around the led display cover just enough to break the adhesive used to seal the component from there you can gently but firmly pull the board/speaker/antenna from the casing leaving behind an empty shell. Mine recently stopped charging so I decided to have a bit of fun before I seen this teardown. Needless to say a little superglue with a new battery and I've got a functional fitbit flex again. Hard part will be finding a replacement battery....