Facebook application caught red-handed shuffling through smartphone owners` address books to change contacts` e-mail addresses with those provided by the social networking platform. This way all the messages a smartphone user sends to their contacts will be actually sent to the e-mails provided by popular social network Facebook. Some reports say some contacts have been duplicated whereas others disappeared from smartphones that have installed the Facebook app. Facebook app has been accused in the past of aggressively promoting their e mail messaging service to snatch market share from arch-rivals such as Gmail or Yahoo Mail.”]