However, in early September 2016, Samsung suspended sales of the phone and announced an informal recall. This occurred after some units of the phones had batteries with a defect that caused them to produce excessive heat, leading to fires and explosions. Samsung replaced the recalled units of the phones with a new version; however, it was later discovered that the new version of the Galaxy Note 7 also had the battery defect. Samsung recalled all Galaxy Note7 smartphones worldwide on 10 October 2016, and permanently ended production of the phone the following day.