From last 2 years I am using Mi mobiles and I have never faced any issue with my mobile.Excellent battery backup and built quality. Now coming to the worst part of Mi.com that is there flash sales and product availability. I don’t know why in India value for money products are limited or not available. Even you try to purchase a budget phones you have to wait for flash sales and some of the blackmarketers sell the product at high cost. Out side India there is no flash sales for Mi products they are available in bluk for common people.At last I would like to say that people who want to buy Mi products. Best of luck !