I BOUGHT THIS IN DECEMBER 2016 AND TILL NOW I AM NOT ABLE TO FILE A SINGLE PROBLEM IN THIS MOBILE, BECAUSE OF THIS MOBILE I BECOME FAN OF XIAOMI, IT IS A BEST FEATURED SMARTPHONE AT VERY VERY LOW PRICE OF 9999, IT BATTARY BACKUP IS AWESOME, ITS LOOK IS CLASSIC, ACCORDING TO ME THIS MOBILE HAVE NOT ANY SINGLE ISSUE OR PROBLEM, A ONLY TINY PROBLEM IT HAVE IS IT HAVE HYBRID SIM SLOT AND IN THAT SLOT AT THE PLACE OF SECOND SIM YOU CAN PUT SECOND SIM CARD OR MEMORY CARD . THIS IS THE ONLY PROBLEM IT HAVE. OTHER THAN IT IS A 5 STAR SMARTPHONE