LOS ANGELES, April 6, 2015 /PRNewswire/ -- ROK Mobile and Mariposa Holdings Group have joined forces to bring to market the Libertad Plan, an MVNO offer for the Hispanic community with specific calling packages to include unlimited talk, text, data and music for just $49.99 per month. ROK and Mariposa have entered into a joint venture bringing the power and passion of their companies together to address this important market.read more