In the modern world any girl cannot manage out-of-pocket communications. However except functions of telephone communication today mobile phones perform still functions of several devices. They can successfully replace to us a musical player, an electronic toy, the camera, hours and even the computer. From what potential the device has, it differently also is called: smartphone, handheld, CPC, communicator. Producers often mislead us only even more, declaring that the brand new mobile device is nearly universal device all in one. Let's try to understand that is represented by these fancy devices, than they are similar and in what differ.