Qantas is banning passengers charging the new Samsung Galaxy Note7 on all flights because of fears devices with faulty batteries could catch fire.

Samsung has issued a global recall of the device after incidents of the devices catching fire when plugged in to charge.

In recent days, there have been two incidents of the device exploding, including one case in Perth where a man's phone was scorched as he slept in his hotel room.

Qantas passenger Dean Cabena told Fairfax Media flight crew warned passengers on a Perth to Sydney flight this week against recharging the device in the air.