(REUTERS/Nacho Doce) A man takes a picture of a friend posing inside a public telephone booth painted by Brazilian artist Carla Pires during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths, which are falling into disuse as mobile phones become cheaper, around Sao Paulo, according to the organizers.

(REUTERS/Nacho Doce) A man takes a picture of a friend posing inside a public telephone booth painted by Brazilian artist Carla Pires during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths, which are falling into disuse as mobile phones become cheaper, around Sao Paulo, according to the organizers.

(REUTERS/Nacho Doce) A woman takes a picture of her boyfriend posing next to a public telephone booth painted by Brazilian artist Juarez Fagundes during the Call Parade art exhibition in Sao Paulo July 7, 2012. According to the organizers, the Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper.

(REUTERS/Nacho Doce) A man takes a picture of a friend posing in front of a public telephone booth painted by Brazilian artist Flavio Scocco de Abreu during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) The interior of a public telephone booth painted by Brazilian artist Alexandre Truff is seen during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A woman poses for a picture taken by her boyfriend (not pictured) next to a public telephone booth painted by Brazilian artist Cako Martin during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers. The words on the telephone booth read, "Love and Respect".

(REUTERS/Nacho Doce) A man looks at a public telephone booth painted by Brazilian artist Juarez Fagundes during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A woman talks on a public telephone booth painted by Brazilian artist Patricia Nascimento during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A man looks at a public telephone booth painted by Brazilian artist Maramgoni during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A public telephone booth decorated by Brazilian artist Emili Akemi is seen during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A public telephone booth painted by Brazilian artist Danilo Roots is seen during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.

(REUTERS/Nacho Doce) A couple walk past a public telephone booth painted by Brazilian artists, daughter and father, Julia and Ricardo Paoliello during the Call Parade art exhibition in Sao Paulo July 7, 2012. The Call Parade is a street art exhibition involving 100 artists who decorated and painted 100 public telephone booths around Sao Paulo, which are falling into disuse as mobile phones become cheaper, according to the organizers.