It is not difficult to project a mobile screen on a wall without a projector. All you need is a shoebox, a magnifier, black tape, construction paper, and a few pins. You can start by making a hole inside the shoe box. The hole shall be equal to the size of the magnifier. Place it inside the hole and block off the empty spaces with the help of tape and use your mobile phone to project the image on the wall by properly focusing it and you are good to go.