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<https://techcrunch.com/2010/07/23/gressos-iphone-4-black-diamond-may-cost-10000-but-the-case-should-fix-the-antenna-issue/>
<https://techcrunch.com/2010/07/23/gressos-iphone-4-black-diamond-may-cost-10000-but-the-case-should-fix-the-antenna-issue/>