Samsung's Note 7s are being pulled from shelves in 10 countries, including South Korea and the United States, just two weeks after the product's launch. Customers who already bought Note 7s will be able to swap them for new smartphones in about two weeks, said Koh Dong-jin, president of Samsung's mobile business. The decision follows reports in the US and South Korea of the phone "exploding" during or after charging. Samsung said it had been difficult to work out which phones were affected among the 2.5 million Note 7s sold. Some buyers reported their phones caught fire or exploded while charging, and Samsung said it had confirmed 35 such cases, caused by faulty batteries. Samsung said it has sold more than 1 million Note 7 smartphones since the product's launch. "There was a tiny problem in the manufacturing process, so it was very difficult to figure out,'' the president of Samsung's mobile business Koh Dong-jin told reporters. "It will cost us so much it makes my heart ache. Nevertheless, the reason we made this decision is because what is most important is customer safety," he said.