There's no escaping from smartphones. Everywhere you look, someone is glued to one and, more often than not, it carries the name Apple or Samsung. It comes as no surprise, therefore, to learn that these technology heavyweights have the two most valuable names on the planet. According to Brand Finance, which released its annual list of the world’s 500 most valuable brands in February, Apple leads the way, being worth nearly $105 billion, followed by its South Korean rival on $79 billion.