Want to try a cool phone hack? This is indeed an easy way to turn your phone into a blacklight and at the same time ruin your warranty ( I kid, I kid). All you need is 3 small pieces of tape, a purple sharpie, and a blue sharpie. The trick, as shown here, allows anyone to use a kind of imitation infrared lamp with a normal smartphone. Honestly this is so simple my 4yr old daughter could do it and he has a little assistance from his little one. Watch the video by DroidModder below for the simple instructions and have fun.