In our time it is almost impossible, I saw the video on Youtube, though it was deleted later. The video shows how the developers on the iPhone 7plus launched the process in their own bitcoin extraction application, the recording was continuous but accelerated, so the smartphone after 20 hours of continuous operation, just turned off and did not turn on anymore 
it is clear that something inside the burned
Oh, My Good! it is clear that something inside the burned
Why did they use iPhone for experiments. They could use something simpler or Android too. After such news, I would not risk with my device that get obscure tokens