This is the terrifying moment a man's smartphone explodes in his front shirt pocket. <br /><br />Hotel supervisor Yulianto, 47, was waiting in the lobby of the building when he suddenly felt the device heat up.<br /><br />He reached up to the phone in his front pocket but moments later it erupts in a fireball.<br /><br />CCTV captured the moment the mobile phone exploded and burst into flames at the Hotel Ciputra in Semarang, Indonesia, on September 30. <br /><br />Yulianto falls to the ground as an onlooker rushes to help him. He then rips off his shirt while it is engulfed in flames. <br /><br />The hotel worker said he had never had problems with his phone before but suddenly felt it heat up. <br /><br />He said: ''There was a strong sensation of heat and I felt something start to shake. <br /><br />''Before I knew what was happening there was fire and I panicked. I took off my shirt as quickly as I could.''<br /><br />Police said that Yulianto was rushed to hospital where he was treated for minor burns on his chest. The injuries were limited by Yulianto quickly taking off his top. <br /><br />He is said to have been using the Wifi, Bluetooth and GPS simultaneously causing the phone to overheat.