USA and Japanese aviation authorities on Friday urged passengers not to turn on or charge Samsung Galaxy Note 7 smartphones on aircraft.
According to The Associated Press, the FAA is asking airline passengers who have the Samsung Galaxy Note 7 smartphone to avoid putting the device in checked luggage due to concerns that the battery could overheat and cause a fire.
The DGCA also advised travellers and air carriers not to stow them in any checked-in baggage.
Samsung said in a statement that "We are aware of the Federal Aviation Administration's statement about the Galaxy Note 7". While shares in South Korea went down 3.9 percent and despite the safety concerns about the Galaxy Note 7, Samsung has been holding up relatively well. But some argued the voluntary recall wasn't enough, since the phones were still on sale.
Out of the 2.5 million Note 7s already sold globally, Samsung said it has not found a way to determine which phones may endanger users.
In February the FAA issued a safety alert about lithium-ion batteries, saying airlines that carried the batteries as cargo carried the "risk of a catastrophic hull loss" after they led to fatal fires on Boeing 747s in 2010 and 2011.
CPSC and Samsung are working cooperatively to formally announce an official recall of the devices, as soon as possible. The Note series is one of Samsung's most expensive, and demand for the phone had been high. The agency said it acted after Samsung reported the incidents involving the phones.
A comprehensive USA ban on using the Note 7 on airplanes could be triggered by an official recall on the product.
Galaxy Note 7, an update to the company's flagship phablet line, was unveiled in August.
Qantas and Virgin Australia also told customers not to use or charge the devices on their planes.
Samsung last week issued a recall of its premium Galaxy Note 7 smartphone in 10 markets, including the United States, as they were equipped with batteries prone to catch fire. Consumer Reports called for the US Consumer Product Safety Commission to step in and do more.