20 years ago, public phones peppered the streets of Rio, along with urban myths of the code that could be typed in in order to call for free and the coin wrapped in a thin line that you could endlessly use to get credits.

Such a reality is nowadays in the past - with the spread of cellphone connectivity throughout the city and smartphone affordability, public phones are rapidly disappearing and being substituted by permanently online portable computers that can also make phone calls - smartphones.

a brand under the renowned telefónica corporation, vivo is part of a global telecommunications empire, which encompasses movistar, for spanish speaking countries, and o2 for various others.

vivo is the brand established for brazil, which services over 3,700 cities, and has an astonishing 91 million customers, making it one of the biggest mobile networks in the country.