Now you see it, now you don't! That may well be the future of smartphones if the OnePlus Concept One phone comes to the market. At the Consumer Electronics Show being held in Las Vegas, OnePlus showcased a phone with disappearing cameras. While there is time for this concept to be available to consumers, the phone is already making headlines for its vanishing act. Our technology reporter, Sanjana Prakash gets you a hands-on with this one-of-a-kind concept phone.