Mobile data revenue will overtake voice by 2018, says GSMA February 25, 2013 8:17 AM Devindra Hardawar Devindra Hardawar LinkedIn Twitter Facebook Google Plus Profile Recent Stories: A look back at Google I/O 2013 (gallery) How cognitive science and user empathy powered Google’s design breakthrough Googlers use Hangouts video chats 20,000 times a day internally Why call when you can text, e-mail, or instant message someone?