Reliance on Thursday officially announced the Jio 4G services in India. It is a truly disruptive launch. Not only it is a service with comparatively affordable data plans but it is also available to anyone with a compatible 4G phone for free for until December 31. Sounds tempting? Yes, it does and we are sure that you must be hoping to get a Jio SIM. But before you decide to get one, here are the key bits that you need to know: The Jio is a 4G service....