I've also been experiencing one hi not responding pop ups , as per samsung service centre guidance I did factory reset thrice and went to service centre again , the also factory reseted the device but there is no change , the phone is still lagging and pops are also coming , even the samsung service guys didn't knew the reason for this . They told me if it's not software issue then the issue is with motherboard and you have to replace it , now I don't know what to do . Can it be system update glitch ?
