Here I come with my new experience as I am a OS developer and do softwares of mobiles, this device came to me with a software issue of malware adds and virus due to which Tab gets stuck. I did its complete software and gave it to customer after a day he came back and told me the problem was still same and device also started turning on and off automatically. I did its flashing again and again but result was same. Then I changed its OS to custom then device lost his many features but avoided from getting on off. Well dont ever dare to buy such unreliable and slow device. Thanks moutshut for letting me share my experiences.