I USING THIS PHONE SINCE 8 MONTHS AND THE BATTERY AND STORAGE SYSTEM IS WORKING EXCELLENT BUT THERE ARE SOME ISSUES ABOUT THE ADS, IS WHEN I USING SOME SOCIAL MEDIA APPLICATIONS THEN TOO MANY ADS ARE OCCUR WITH A NEW SLIDE AND THEN THE PLAY STORE ARE OPEN ITSELF AND SOMETIMES GOOGLE SLIDE SHOW OCCUR WITH THE ADS OR MESSAGE OF THAT THERE ARE TOO MANY VIRUS ON YOUR SMARTPHONE OR SOMETHING ELSE, AND IAM VERY DISSAPOINTED WITH THAT THEN I CALL SMASUNG CUSTOMER CARE, AND TELL US ABOUT THIS PROBLEM THEN CUSTOMER CARE EXECUTIVE TELL ME TO DOWNLOAD THE SAMSUNG TUTOR APP THEN CALL AGAIN TO THE CUSTOMER CARE, SON I CALL AGAIN AND THE CUSTOMER CARE EXECUTIVE CONTROLS MY PHONE FROM THE OFFICE AND SOLVE MY PROBLEM.THE PHONE IS EXCELLENT AND IN LOW PRICE.THE CAMERA QUALITY AND FOCUS IS AMAZING.IN MY OPINION THE OVERALL MY REVIEW IS 9/10.