Yes I have similar but bigger problem I have the same issue. Just on Jan 23, 2016 baught Samsung A8 Galaxy and no event of dropping or any hard hit, all of sudden today the screen has become pink and purple color, initially started on top left corner and spread the whole phone with in 3 hours. The customer center argue it could be a due to physical damage while there is no single scratch, and even to do entry level screening the testing procedure for this model may break the glass and I may have to pay the expenses that comes around 8600 or so, how can I trust their testing procedure, even samsung customer care says the same but they say they can't give written confirmation nor produce proper root cause analysis. What a pathetic story, my bad luck is this is 2nd time i am facing this issue with Samsug, NO MORE SAMSUNG BUYING from me.