WASHINGTON: A 17-year-old Brazilian boy has broken his own Guinness World record for the fastest texting on a smartphone touch screen, typing a 25-word message in just 17 seconds.

Marcel Fernandes Filho had broken the world record for the fastest time to type a text message on a touch screen mobile phone in May after typing the standard Guinness World Records texting passage on a Samsung Galaxy S4 in 18.19 seconds.

Filho has now used an iPhone 6 Plus and software company Syntellia's Fleksy keyboard to shave off over a second from his original benchmark time, finishing the message in an incredible 17 seconds. To set the record, Marcel needed to correctly type the following passage: The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world. In reality they seldom attack a human.

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