I bought my Samsung S7 Edge from Singtel like 2 months ago and now after I update my phone, has these horizontal grey lines across my phone. This problem occur like twice and the first time I had this problem is 1 week after I bought it and went to Samsung Service Center. But now, I accidentally dropped my phone and the screen cracked and there is still horizontal grey lines present. Wil Samsung Warranty cover the crack screen n the lines?