Samsung recalled Galaxy Note 7 phones worldwide in 2016 because some batteries could ignite.
The original recall followed reports that lithium-ion batteries could overheat and catch fire. Samsung first attempted to address the problem with replacement devices, but reports involving replacement phones led to a second recall and the permanent discontinuation of the model.
The Galaxy Note 7 was announced in 2016, despite the question’s reference to the 2015 phone line context. The device was sold in multiple markets and used batteries supplied through more than one manufacturing source. Investigations later identified battery-related design and manufacturing problems.
Airlines and aviation regulators took unusual steps by restricting the phone on flights. The episode became a major example of the risks of lithium-ion battery failures in portable electronics and of the difficulty of managing a global recall involving millions of connected consumers.