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A comment on Nexus 4′s Glass Back, the Worst Idea Since the Last Phone With a Glass Back. Parent comment

Re:Nexus 4′s Glass Back, the Worst Idea Since the Last Phone... by ktsmith on Wednesday November 28, 2012 @12:28PM (#4843635)
Optical sapphire has different properties than gorilla glass. There can be reasons other than hardness for using a material as a lens cover.
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Re:Nexus 4′s Glass Back, the Worst Idea Since the Last Phone... by Osmium on Wednesday November 28, 2012 @12:40PM (#4843700)
Agreed; but Apple did state specifically that they were using it because it was more durable. In regards to optical properties, some people are speculating the sapphire is the cause of the iPhone 5's worse susceptibility to lens flare.
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