An iPhone 4 has reportedly caught fire while charging, the second report of a combustable iPhone this week. According to Brazil’s The iPhone Blog (Translated Link), Ayla Paulo Mota plugged her iPhone in to charge overnight, and awoke at dawn to see sparks and black smoke coming out of the device, which was just 15cm (roughly six inches) from her head. Unfortunately for Mota, her iPhone was purchased in France, and according to the report only phones purchased in Brazil are covered by Apple’s warranty in the country. Earlier this week, an iPhone 4 unit began emitting smoke aboard an airplane; that unit has since been turned over to aviation authorities for further investigation.