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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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What is this black sticky square behind glass

I removed my first cracked glass off of an iphone 4 today but during the process I got stumped because of a black sticky square that was attached to the back off the glass and a chrome plate. It was in between the plate and glass. How do I remove this and do I need it? And what is it? I do have a heat gun and all tools. Please help

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Graphite heat spreader

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