Sent from my SGH-T989 using XDA App
i took a look around on gorilla glass manufacturing, i think this is actually a manufacturing defect that occurs over time
gorilla is made by heating glass to 400C and dipping it in molten potassium(to rid of the sodium ions in glass and replace it with potassium, which is a bigger ion) what this does is that it creates more surface tension, as the surface of the glass is pushed together, therefore getting rid of "imperfections" and so it does not crack as easily
the con in this process is that the "breathing" room for these ions are gone, so if you were in a really cold place, chances are your screen is a bit cold too..then it gets heated up and the potassium ion has no where to go, therefore forming this hairline crack
The phone is too big to go in your pocket ,cause when you sit down you are putting pressure on the thin phone and sometime the plastic flex a little will crack the glass. Not like HTC where they have metal in the back . Samsung Phones are allways built like toys.thats the reason why I don't like Samsuk.
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