Xelibri X4 (Paperback)

High Quality Content by WIKIPEDIA articles! Xelibri X4 is a GSM dual band mobile phone which is part of the first the Siemens Xelibri collection of mobile phones. The X4 has a very unusual casing design which is flat on the top and tapers to a sharp point at the bottom, the numerical keypad is arranged in a V formation. A mobile phone (also called mobile, cellphone or handphone) is an electronic device used for mobile telecommunications over a cellular network of base stations known as cell sites. Mobile phones differ from cordless telephones, which only offer telephone service within limited range through a single base station attached to a fixed line, for example within a home or an office.