My iPad4 screen is flickering & Flashing when i scroll in app store and when i open gmail app

Hi , i am Using An iPad 4th Gen .. after 5-6 days of observation i noticed that my iPad screen flickers when i scroll in app store and when i open Gmail application .. i also checked my Brothers iPad 4 and few of my friends there is no problem in there iPad ..their iPAD SCREEN not flickers when they open (app store & gmail ) TODAY, i went to the service centre .. the staff told me that its a software problem and nothing else .. they updated the software but the problem was not resolved .the screen is still flikering .. what should i do .. plz help .. Will the company replace my product .. ??? my iPad is running on iOS 6.1.3