Here's the first thing to understand. All these different kinds of electromagnetic radiation are the same stuff, but in different frequencies. What makes it possible to talk in the mobile is the same stuff that makes it possible to pop-popcorns, X-ray your broken arm and use your eyes to see.

So what's this electromagentic radiation made of?

Grab on to something: Photones.

Photons are very interesting particles. Most of us know them as carriers of light, but photons are also responsible for all the kinds of radiation mentioned above, but there's more. Photons are also the "stuff" making up magentic fields.

If you think of it, it's a bit funny. When our ancestors lit signal fires to alert each others of impending danger, they used virtually the same mechanism as we do today when we pick up the mobile and call someone. It's all photons being sent back and forth.

I for one is wondering how large my flashlight have to be in order to make it attract metals like a magnet, but I guess that one's gonna require some more research before I can get it all figured.