Samsung Galaxy Note 7 phones have been banned from all planes in the US following reports of the devices catching fire.
The order from the country’s Transportation Department bars owners from carrying on the phones or taking them in baggage during flights from 16:00 GMT on Saturday.
It warned that people who packed the devices in checked luggage raised the risk of “a catastrophic incident”, and passengers caught attempting to bring them on a plane could be fined or have them confiscated.
Transportation Secretary Anthony Foxx said: “We recognise that banning these phones from airlines will inconvenience some passengers, but the safety of all those aboard an aircraft must take priority.
“We are taking this additional step because even one fire incident inflight poses a high risk of severe personal injury and puts many lives at risk.”
Samsung recalled about 2.5 million of its flagship phone last month after reports some had caught fire because of faulty lithium batteries.
Earlier this week, Samsung permanently discontinued production and sales of the Note 7 worldwide after failing to overcome the battery problems.
The firm also sent customers in the US fire-resistent packages this week to return the faulty devices.
The kits contain a protective bag, thermally insulated boxes and gloves.
The South Korean firm said its profits will take a £4.3bn hit from costs associated with its failed smartphone.