I AM BAUGHT THIS PHONE ABOUT 1 MONTHS AGO.I USING THIS PHONE AND I HAVE NOT FACED ANY PROBLEM IN THIS PHONE.ITS VERY CHEAP SMARTPHONE WITH HIGH FEATURES AND ATTRACTIVE DESIGN.ITS OPERATING SYSTEM IS ANDROID OS v7.0 ( NOUGAT) WITH 3GB RAM.ITS BATTERY BACK-UP IS GOOD AND SOUND QUALITY IS CLEAR.ITS USER-FRIENDLY SMARTPHONE AND I LIKE THIS PHONE.IF YOU THINKING BUY A SMARTPHONE SO YOU BUY THIS SMARTPHONE.