Most likely, you have heard of the generations of mobile phones, rather than the mobile communications systems that are used by mobile phones. Most likely also, you don’t have a precise idea of the ones that exist and the difference between them. In fact, the telecommunications industry has called technological leaps in mobile communications systems for generations, which have emerged regularly at the beginning of each decade. ” An article at the ionline by Luis Correia, Vice-President for the Management of the Taguspark Campus and coordinator of the Radio on Wireless research group at INESC-ID: