If you used Google Talk, Facebook Chat, imo, or any other data-based social messaging platform on your phone, congratulations. You helps reduce the pockets of mobile providers by nearly $14 billion. That's the number that analytics group Ovum came up with, saying the rise of instant messaging apps is killing what is one of the highest margin line items on any cell phone bill. And it isn't just text messaging. New apps that allow users to place calls without using any plan minutes are also on the rise.