Samsung Electronics is urging consumers worldwide to stop using Galaxy Note 7 smartphones immediately and exchange them as soon as possible.
The call from the South Korean company, the world's largest smartphone maker, comes as more reports of the phones catching fire emerged even after the company's global recall.
US authorities urged users to switch the Galaxy Note 7 off and not to use or charge it during a flight.
Several airlines around the world have asked travellers not switch on the jumbo smartphone or put it in checked baggage, with some carriers banning the phone on flights.
In a statement posted on Saturday on its website, Samsung asked users around the world to ``immediately'' return their existing Galaxy Note 7 and get a replacement.
``We are asking users to power down their Galaxy Note 7s and exchange them as soon as possible,'' said Koh Dong-jin, Samsung's mobile president.
``We are expediting replacement devices so that they can be provided through the exchange program as conveniently as possible.''
Consumers can visit Samsung's service centres to receive rental phones for temporary use. Samsung plans to provide Galaxy Note 7 devices with new batteries in South Korea starting on September 19, but schedules for other countries vary.
Earlier this month, Samsung announced an unprecedented recall of 2.5 million Galaxy Note 7s worldwide just two weeks after the phone was launched.
That move came after Samsung's investigation into reports of fires found that rechargeable lithium batteries manufactured by one of its suppliers were at fault.
Samsung said it had confirmed 35 cases of the Galaxy Note 7 catching fire as of September 1, most of them occurring while the battery was being charged.
There are at least two more cases that Samsung said it is aware of - one at a hotel in Perth and another in St Petersburg, Florida, where a family reported that a Galaxy Note 7 left charging in their Jeep had caught fire, destroying the vehicle.
Samsung released the Galaxy Note 7 on August 19. The Galaxy Note series is one of the most expensive lineups made by Samsung.
