The mobile is heating so fast.when we play games the heating problem is too much in lenovo k4 . heating problem arises so oftenly. the mobile I bought before 3 months back. I cannot continously use the mobile for 1 hour due to heating problem. the problem should be taken as consideration and slove it as soon as possible. am facing lots of problem with my lenovo k4 note. I strongly recommend not to buy this mobile. the worst mobile and rate of the mobile is also not eaqaul to that product. due to heating problem phone is lagging so worst. It gets heated whenever a user tries to use Internet over 3G or 4G network. it also happens when user tries to use heavy apps like facebook, youtube and other graphic oriented games. some of the users experice very heavy heating and some users experices less heat. so I recommend its worthless