Electronics company Samsung has confirmed two incidents of their newly-released smartphone exploding in Australia in recent days, including a case in Perth on Monday where a man's phone exploded as he slept in his hotel room.

The Galaxy Note7 smartphone has been recalled around the world after safety concerns emerged about the battery causing fires while the phone was plugged in to charge.

More than 50,000 of the phones will be recalled in Australia.

Victorian man Tham Hua, who was visiting Perth on a business trip, said he plugged in the smartphone to charge before he slept, resting it on his hotel mattress.