anyone noticed or not the only useful thing in the survey was battery at which rn 4 is awesome but there was no Questions on the area where rn4 is lagging. In the survey issues raised by many rn 4 users having dead pixels and bugs in miui etc. were not there . I have 5-7 dead pixels in my rn4 screen and i am using rn3 and rn4 both! but the thing is that rn4 seems to have too many bugs and it also take some time to load apps where as rn3 doesn't.