Here is how you can trap your friends inside your phone.  Put them inside your phone and they're there forever. And let them look like trying to come out of it, each time they call or message. All you need is a glass pane and a mobile.

You can take photographs of your friends with their face squished against glass, let it be your window glass or your car glass, anything could work. Then assign those photographs to your phone contacts. Hurray! Now it’ll look like they’re trapped inside your phone!