I have been using this phone for more than 8 months, till now there is no heating problem or lagging problem. The screen resolution is awesome and the sound clarity is clear. The HD LCD display is a good as led display. The battery after full recharge in the morning lasts till the end of the day with 40-30% left in balance. the design and look is also good. value is not high. only con I have found in this device is no OTG support. I suggest to buy the grand 2.