The Note 7 is dead: What Samsung must do now

Samsung formally stopped production, sales and exchanges of its Note7 smartphones early Tuesday, after several weeks of reports that the devices -- and even their replacements -- overheated, smoked and caught fire.[ Related: Timeline of Samsung's disastrous Galaxy Note7 debacle ]The death of the Note7 will be costly, according to many analysts.Patrick Moorhead of Moor Insights & Strategy has pegged the overall cost to Samsung at $5 billion to $7.5 billion, not including the hard-to-estimate